Built in datums
Tip
Unless you are trying to work with a coordinate reference system that doesn’t exist in the built-in set, you don’t need to worry about these, the correct one will be instantiated for you.
AIOC 1995
Datum::fromSRID(Datum::EPSG_AIOC_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5133')
Average level of Caspian Sea at the Oil Rocks tide gauge June-September 1995.
AIOC 1995 datum is 1.7m above Caspian datum and 26.3m below Baltic datum.
AbInvA96_2020 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_ABINVA96_2020_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1273')
Defined through the application of the AbInvA96_2000 NTv2 transformation (code 9386) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2020 to support intermediate CRS “AbInvA96_2020-IRF” in the emulation of the AbInvA96_2020 Snake map projection.
Abidjan 1987
Datum::fromSRID(Datum::EPSG_ABIDJAN_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6143')
Fundamental point: Abidjan I. Latitude: 5°18’51.01”N, longitude: 4°02’06.04”W (of Greenwich).
Accra
Datum::fromSRID(Datum::EPSG_ACCRA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6168')
Fundamental point: GCS Station 547. Latitude: 5°23’43.3”N, longitude: 0°11’52.3”W (of Greenwich).
Replaced in 1978 by Leigon datum (code 6250).
Aden 1925
Datum::fromSRID(Datum::EPSG_ADEN_1925)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1135')
Adindan
Datum::fromSRID(Datum::EPSG_ADINDAN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6201')
Fundamental point: Station 15; Adindan. Latitude: 22°10’07.110”N, longitude: 31°29’21.608”E (of Greenwich).
The 12th parallel traverse of 1966-70 (Point 58 datum, code 6620) is connected to the Blue Nile 1958 network in western Sudan. This has given rise to misconceptions that the Blue Nile network is used in west Africa.
Afgooye
Datum::fromSRID(Datum::EPSG_AFGOOYE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6205')
Agadez
Datum::fromSRID(Datum::EPSG_AGADEZ)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6206')
Ain el Abd 1970
Datum::fromSRID(Datum::EPSG_AIN_EL_ABD_1970)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6204')
Fundamental point: Ain El Abd. Latitude: 28°14’06.171”N, longitude: 48°16’20.906”E (of Greenwich).
Albanian 1987
Datum::fromSRID(Datum::EPSG_ALBANIAN_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6191')
Alicante
Datum::fromSRID(Datum::EPSG_ALICANTE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5180')
Mean Sea Level at Alicante between 1870 and 1872.
Orthometric heights.
American Samoa 1962
Datum::fromSRID(Datum::EPSG_AMERICAN_SAMOA_1962)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6169')
Fundamental point: Betty 13 eccentric. Latitude: 14°20’08.34”S, longitude: 170°42’52.25”W (of Greenwich).
American Samoa Vertical Datum of 2002
Datum::fromSRID(Datum::EPSG_AMERICAN_SAMOA_VERTICAL_DATUM_OF_2002)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1125')
Mean sea level at Pago Pago harbor, Tutuila. Benchmark 1770000 S TIDAL = 1.364m relative to National Tidal Datum Epoch 1983-2001.
Replaces Tutuila vertical datum of 1962 (datum code 1121). Replaced by Pago Pago local tidal datum (datum code 1302) in March 2020 after ASVD02 benchmarks destroyed by earthquake activity.
Amersfoort
Datum::fromSRID(Datum::EPSG_AMERSFOORT)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6289')
Originally defined through fundamental point Amersfoort, latitude 52°09’22.178”N, longitude 5°23’15.478”E (of Greenwich). Since 2000-10-01 has been redefined as derived from ETRS89 by application of the official transformation RDNAPTRANS(TM).
Ammassalik 1958
Datum::fromSRID(Datum::EPSG_AMMASSALIK_1958)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6196')
Ancienne Triangulation Francaise (Paris)
Datum::fromSRID(Datum::EPSG_ANCIENNE_TRIANGULATION_FRANCAISE_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6901')
Uses the RGS value for the Paris meridian. In Alsace, data suspected to be transformation of German network into ATF. Replaced by Nouvelle Triangulation Francaise (Paris) (code 6807) which uses the 1936 IGN value for the Paris meridian.
Anguilla 1957
Datum::fromSRID(Datum::EPSG_ANGUILLA_1957)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6600')
Fundamental point: station A4, Police.
Antalya
Datum::fromSRID(Datum::EPSG_ANTALYA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5173')
Mean sea Level at Antalya 1936-71.
Orthometric heights.
Antigua 1943
Datum::fromSRID(Datum::EPSG_ANTIGUA_1943)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6601')
Fundamental point: station A14.
Aratu
Datum::fromSRID(Datum::EPSG_ARATU)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6208')
Arc 1950
Datum::fromSRID(Datum::EPSG_ARC_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6209')
Fundamental point: Buffelsfontein. Latitude: 33°59’32.000”S, longitude: 25°30’44.622”E (of Greenwich).
Arc 1960
Datum::fromSRID(Datum::EPSG_ARC_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6210')
Fundamental point: Buffelsfontein. Latitude: 33°59’32.000”S, longitude: 25°30’44.622”E (of Greenwich).
Ascension Island 1958
Datum::fromSRID(Datum::EPSG_ASCENSION_ISLAND_1958)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6712')
Astro DOS 71
Datum::fromSRID(Datum::EPSG_ASTRO_DOS_71)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6710')
Fundamental point: DOS 71/4, Ladder Hill Fort, latitude: 15°55’30”S, longitude: 5°43’25”W (of Greenwich).
Auckland 1946
Datum::fromSRID(Datum::EPSG_AUCKLAND_1946)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5157')
MSL at Auckland harbour 1909-1923.
Australian Antarctic Datum 1998
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_ANTARCTIC_DATUM_1998)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6176')
Australian Geodetic Datum 1966
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_GEODETIC_DATUM_1966)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6202')
Fundamental point: Johnson Memorial Cairn. Latitude: 25°56’54.5515”S, longitude: 133°12’30.0771”E (of Greenwich).
Australian Geodetic Datum 1984
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_GEODETIC_DATUM_1984)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6203')
Fundamental point: Johnson Memorial Cairn. Latitude: 25°56’54.5515”S, longitude: 133°12’30.0771”E (of Greenwich).
Uses all data from 1966 adjustment with additional observations, improved software and a geoid model.
Australian Height Datum
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_HEIGHT_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5111')
Mainland: MSL 1966-68 at 30 gauges around coast. Tasmania: MSL 1972 at Hobart and Burnie. Christmas Island: MSL (details unspecified). Cocos and Keeling Islands: MSL (details unspecified).
Normal-orthometric heights. Initially defined for mainland only, with independent height datums for Australian mainland, Tasmania, Christmas Island and Cocos and Keeling Islands. With introduction of AUSGeoid2020 in 2017, all considered to be AHD.
Australian Height Datum (Tasmania)
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_HEIGHT_DATUM_TASMANIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5112')
MSL 1972 at Hobart and Burnie.
Australian Terrestrial Reference Frame 2014
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_TERRESTRIAL_REFERENCE_FRAME_2014)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1291')
ITRF2014 at epoch 2020.0.
Densification of ITRF2014 in the Australian region.
Australian Vertical Working Surface
Datum::fromSRID(Datum::EPSG_AUSTRALIAN_VERTICAL_WORKING_SURFACE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1292')
Realized by the Australian gravimetric quasi-geoid (AGQG).
Normal heights. Extends gravity-related heights to offshore. See AHD (datum code 5111) for cadastral survey or local engineering survey including construction or mining.
Autonomous Regions of Portugal 2008
Datum::fromSRID(Datum::EPSG_AUTONOMOUS_REGIONS_OF_PORTUGAL_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1041')
ITRF93 as derived from the 1994 TransAtlantic Network for Geodynamics and Oceanography (TANGO) project.
Replaces older classical datums for Azores and Madeira archipelagos.
Average Terrestrial System 1977
Datum::fromSRID(Datum::EPSG_AVERAGE_TERRESTRIAL_SYSTEM_1977)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6122')
In use from 1979. To be phased out in late 1990’s.
Ayabelle Lighthouse
Datum::fromSRID(Datum::EPSG_AYABELLE_LIGHTHOUSE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6713')
Fundamental point: Ayabelle Lighthouse.
Azores Central Islands 1948
Datum::fromSRID(Datum::EPSG_AZORES_CENTRAL_ISLANDS_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6183')
Fundamental point: Graciosa south west base. Latitude: 39°03’54.934”N, longitude: 28°02’23.882”W (of Greenwich).
Replaced by 1995 adjustment (datum code 6665).
Azores Central Islands 1995
Datum::fromSRID(Datum::EPSG_AZORES_CENTRAL_ISLANDS_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6665')
Fundamental point: Graciosa south west base. Origin and orientation constrained to those of the 1948 adjustment.
Classical and GPS observations. Replaces 1948 adjustment (datum code 6183).
Azores Occidental Islands 1939
Datum::fromSRID(Datum::EPSG_AZORES_OCCIDENTAL_ISLANDS_1939)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6182')
Fundamental point: Observatario Meteorologico Flores.
Azores Oriental Islands 1940
Datum::fromSRID(Datum::EPSG_AZORES_ORIENTAL_ISLANDS_1940)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6184')
Fundamental point: Forte de São Bras.
Replaced by 1995 adjustment (datum code 6664).
Azores Oriental Islands 1995
Datum::fromSRID(Datum::EPSG_AZORES_ORIENTAL_ISLANDS_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6664')
Fundamental point: Forte de São Bras. Origin and orientation constrained to those of the 1940 adjustment.
Classical and GPS observations. Replaces 1940 adjustment (datum code 6184).
Baltic 1957
Datum::fromSRID(Datum::EPSG_BALTIC_1957)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1202')
Datum: average water level at Kronstadt 1833. Network adjusted in 1957 as Uniform Precise Leveling Network of Eastern Europe (EPNN).
Uses Normal heights.
Baltic 1977
Datum::fromSRID(Datum::EPSG_BALTIC_1977)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5105')
Datum: average water level at Kronstadt 1833. Network adjusted in 1974-78 as Uniform Precise Leveling Network of Eastern Europe (EPNN).
Uses Normal heights. Adjustment also included former Czechoslovakia but was not adopted there, the 1957 adjustment being retained instead.
Baltic 1980
Datum::fromSRID(Datum::EPSG_BALTIC_1980)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5185')
Uses Normal heights.
Baltic 1982
Datum::fromSRID(Datum::EPSG_BALTIC_1982)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5184')
Network adjusted in 1982. Height at reference point Varna defined as 1958 value from the UPLN adjustment. Datum at Kronstadt is mean sea level of Baltic in 1833.
Uses Normal heights.
Baltic 1986
Datum::fromSRID(Datum::EPSG_BALTIC_1986)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1296')
Mean sea level of Baltic at Kronstadt in 1833. Network adjusted in 1982.
Uses Normal heights. Adopted in 1986.
Bandar Abbas
Datum::fromSRID(Datum::EPSG_BANDAR_ABBAS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5150')
Average sea level at Bandar Abbas 1995-2001.
Replaces Fao (datum code 5149) in Iran.
Barbados 1938
Datum::fromSRID(Datum::EPSG_BARBADOS_1938)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6212')
Fundamental point: HMS Challenger astro station M1, St. Anne’s Tower. Latitude 13°04’32.53”N, longitude 59°36’29.34”W (of Greenwich).
Batavia
Datum::fromSRID(Datum::EPSG_BATAVIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6211')
Fundamental point: Longitude at Batavia Astro. Station. Latitude: 6°07’39.522”S, longitude: 106°48’27.790”E (of Greenwich). Latitude and azimuth at Genuk.
Batavia (Jakarta)
Datum::fromSRID(Datum::EPSG_BATAVIA_JAKARTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6813')
Fundamental point: Longitude at Batavia astronomical station. Latitude: 6°07’39.522”S, longitude: 0°00’00.0”E (of Jakarta). Latitude and azimuth at Genuk.
Beduaram
Datum::fromSRID(Datum::EPSG_BEDUARAM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6213')
Beijing 1954
Datum::fromSRID(Datum::EPSG_BEIJING_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6214')
Pulkovo, transferred through Russian triangulation.
Scale determined through three baselines in northeast China. Discontinuities at boundaries of adjustment blocks. From 1982 replaced by Xian 1980 and New Beijing.
Bekaa Valley 1920
Datum::fromSRID(Datum::EPSG_BEKAA_VALLEY_1920)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1137')
Belfast Lough
Datum::fromSRID(Datum::EPSG_BELFAST_LOUGH)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5131')
Mean sea level between 1951 and 1956 at Clarendon Dock, Belfast. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights. Malin Head (datum code 5130) used for 1:50,000 and smaller mapping.
Bellevue
Datum::fromSRID(Datum::EPSG_BELLEVUE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6714')
Datum covers all the major islands of Vanuatu in two different adjustment blocks, but practical usage is as given in the area of use.
Bermuda 1957
Datum::fromSRID(Datum::EPSG_BERMUDA_1957)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6216')
Fundamental point: Fort George base. Latitude 32°22’44.36”N, longitude 64°40’58.11”W (of Greenwich).
Bermuda 2000
Datum::fromSRID(Datum::EPSG_BERMUDA_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6762')
ITRF96 at epoch 2000.0.
Bern 1938
Datum::fromSRID(Datum::EPSG_BERN_1938)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6306')
Fundamental point: Old Bern observatory. Latitude: 46°57’07.890”N, longitude: 7°26’22.335”E (of Greenwich).
This redetermination of the coordinates of fundamental point is used for scientific purposes and as the graticule overprinted on topographic maps constructed on the CH1903 / LV03 projected CS (code 21781).
Bhutan National Geodetic Datum
Datum::fromSRID(Datum::EPSG_BHUTAN_NATIONAL_GEODETIC_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1058')
ITRF2000 at epoch 2003.87
Bioko
Datum::fromSRID(Datum::EPSG_BIOKO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1136')
Bissau
Datum::fromSRID(Datum::EPSG_BISSAU)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6165')
Black Sea
Datum::fromSRID(Datum::EPSG_BLACK_SEA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5134')
Black Sea datum is 0.4m below Baltic datum.
Bluff 1955
Datum::fromSRID(Datum::EPSG_BLUFF_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5158')
MSL at Invercargill harbour over 8 years between 1918 and 1934.
Bogota 1975
Datum::fromSRID(Datum::EPSG_BOGOTA_1975)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6218')
Fundamental point: Bogota observatory. Latitude: 4°35’56.570”N, longitude: 74°04’51.300”W (of Greenwich).
Replaces 1951 adjustment. Replaced by MAGNA-SIRGAS (datum code 6685).
Bogota 1975 (Bogota)
Datum::fromSRID(Datum::EPSG_BOGOTA_1975_BOGOTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6802')
Fundamental point: Bogota observatory. Latitude: 4°35’56.570”N, longitude: 0°E (of Bogota).
Bora Bora SAU 2001
Datum::fromSRID(Datum::EPSG_BORA_BORA_SAU_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5202')
Fundamental benchmark: Vaitape quay SHOM benchmark B.
Included as part of NGPF - see datum code 5195.
British Isles height ensemble
Datum::fromSRID(Datum::EPSG_BRITISH_ISLES_HEIGHT_ENSEMBLE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1288')
Ensemble of 9 independent vertical datums now all defined through OS geoid model OSGM15.
Orthometric heights.
Bukit Rimpah
Datum::fromSRID(Datum::EPSG_BUKIT_RIMPAH)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6219')
2°00’40.16”S, 105°51’39.76”E (of Greenwich).
Bulgaria Geodetic System 2005
Datum::fromSRID(Datum::EPSG_BULGARIA_GEODETIC_SYSTEM_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1167')
Densification of ETRS89 realised through network of 112 permanent GNSS reference stations in ETRF2000@2005.0.
Adopted as official Bulgarian reference datum through decree 153 of 2010-07-29.
Bulgarian Height System 2005
Datum::fromSRID(Datum::EPSG_BULGARIAN_HEIGHT_SYSTEM_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1300')
Bulgarian realisation of EVRF2007. EVRF2007 heights of 58 points in Bulgaria held fixed.
Uses Normal heights. Adopted as official Bulgarian height reference datum through decree 153 of 2010-07-29.
CH1903
Datum::fromSRID(Datum::EPSG_CH1903)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6149')
Fundamental point: Old Bern observatory. Latitude: 46°57’08.660”N, longitude: 7°26’22.500”E (of Greenwich).
CH1903 (Bern)
Datum::fromSRID(Datum::EPSG_CH1903_BERN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6801')
Fundamental point: Old Bern observatory. Latitude: 46°57’08.660”N, longitude: 0°E (of Bern).
CH1903+
Datum::fromSRID(Datum::EPSG_CH1903_PLUS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6150')
Fundamental point: Zimmerwald observatory.
CR-SIRGAS
Datum::fromSRID(Datum::EPSG_CR_SIRGAS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1225')
ITRF2008 (IGb08) at epoch 2014.59. Network of 42 GNSS stations of the passive and active reference system.
Replaces CR05 from April 2018.
Cadastre 1997
Datum::fromSRID(Datum::EPSG_CADASTRE_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1037')
Coordinates of 1 station of Combani 1950 adjustment held fixed.
Derived by adjustment of GPS-observed network which was constrained to Combani 1950 coordinates of one station.
Cagliari 1956
Datum::fromSRID(Datum::EPSG_CAGLIARI_1956)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1307')
Mean Sea Level at Cagliari 1955-1957.
Orthometric heights.
Cais da Figueirinha - Angra do Heroismo
Datum::fromSRID(Datum::EPSG_CAIS_DA_FIGUEIRINHA_ANGRA_DO_HEROISMO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1107')
Mean Sea Level during 1951 at Cais da Figueirinha - Angra do Heroísmo.
Orthometric heights.
Cais da Madalena
Datum::fromSRID(Datum::EPSG_CAIS_DA_MADALENA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1105')
Mean Sea Level during 1937 at Cais da Madalena.
Orthometric heights.
Cais da Pontinha - Funchal
Datum::fromSRID(Datum::EPSG_CAIS_DA_PONTINHA_FUNCHAL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1101')
Mean Sea Level during 1913 at Cais da Pontinha, Funchal.
Orthometric heights.
Cais da Vila - Porto Santo
Datum::fromSRID(Datum::EPSG_CAIS_DA_VILA_PORTO_SANTO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1102')
Mean Sea Level during 1936 at Cais da Vila, Porto Santo.
Orthometric heights.
Cais da Vila do Porto
Datum::fromSRID(Datum::EPSG_CAIS_DA_VILA_DO_PORTO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1109')
Mean Sea Level during 1965 at Cais da Vila, Porto.
Orthometric heights.
Cais das Velas
Datum::fromSRID(Datum::EPSG_CAIS_DAS_VELAS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1103')
Mean Sea Level during 1937 at Cais das Velas.
Orthometric heights.
Camacupa 1948
Datum::fromSRID(Datum::EPSG_CAMACUPA_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6220')
Fundamental point: Campo de Aviaçao. Latitude: 12°01’09.070”S, Longitude = 17°27’19.800”E (of Greenwich).
Provisional adjustment, replaced in 2015 for onshore use by Camacupa 2015.
Camacupa 2015
Datum::fromSRID(Datum::EPSG_CAMACUPA_2015)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1217')
Fundamental point: Campo de Aviaçao. Latitude: 12°01’08.702”S, Longitude = 17°27’19.515”E (of Greenwich).
Second adjustment. Not used for offshore oil and gas exploration and production.
Camp Area Astro
Datum::fromSRID(Datum::EPSG_CAMP_AREA_ASTRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6715')
Campo Inchauspe
Datum::fromSRID(Datum::EPSG_CAMPO_INCHAUSPE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6221')
Fundamental point: Campo Inchauspe. Latitude: 35°58’16.56”S, longitude: 62°10’12.03”W (of Greenwich).
Canadian Geodetic Vertical Datum of 1928
Datum::fromSRID(Datum::EPSG_CANADIAN_GEODETIC_VERTICAL_DATUM_OF_1928)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5114')
Based on the mean sea level determined from several tidal gauges located in strategic areas of the country.
From November 2013 replaced by CGVD2013 (datum code 1127).
Canadian Geodetic Vertical Datum of 2013 (CGG2013)
Datum::fromSRID(Datum::EPSG_CANADIAN_GEODETIC_VERTICAL_DATUM_OF_2013_CGG2013)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1127')
Defined by the equipotential surface W0 = 62,636,856.0 m^2s^-2, which by convention represents the coastal mean sea level for North America, realized through the Canadian gravimetric geoid (CGG) 2013 at epoch 2010.0.
Replaces CGVD28 from November 2013. Replaced by CGVD2013(CGG2013a) epoch 2010 from December 2015, supplemented from February 2021 by snapshots of CGVD2013(CGG2013a) at epochs 1997.0 and 2002.0 (aligned with NAD83(CSRS) realization epochs).
Canadian Geodetic Vertical Datum of 2013 (CGG2013a) epoch 1997
Datum::fromSRID(Datum::EPSG_CANADIAN_GEODETIC_VERTICAL_DATUM_OF_2013_CGG2013A_EPOCH_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1326')
Defined by the equipotential surface W0 = 62,636,856.0 m^2s^-2, which by convention represents the coastal mean sea level for North America, realized through the Canadian gravimetric geoid 2013a applied at epoch 1997.0.
CGVD2013(CGG2013a) is a static datum; however, heights referenced to it change with time, primarily due to glacial isostasy. This datum supports CGVD2013(CGG2013a) heights at epoch 1997.0. Other snapshots are at epochs 2002.0 and 2010.0.
Canadian Geodetic Vertical Datum of 2013 (CGG2013a) epoch 2002
Datum::fromSRID(Datum::EPSG_CANADIAN_GEODETIC_VERTICAL_DATUM_OF_2013_CGG2013A_EPOCH_2002)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1325')
Defined by the equipotential surface W0 = 62,636,856.0 m^2s^-2, which by convention represents the coastal mean sea level for North America, realized through the Canadian gravimetric geoid 2013a applied at epoch 2002.
CGVD2013(CGG2013a) is a static datum; however, heights referenced to it change with time, primarily due to glacial isostasy. This datum supports CGVD2013(CGG2013a) heights at epoch 2002.0. Other snapshots are at epochs 1997.0 and 2010.0.
Canadian Geodetic Vertical Datum of 2013 (CGG2013a) epoch 2010
Datum::fromSRID(Datum::EPSG_CANADIAN_GEODETIC_VERTICAL_DATUM_OF_2013_CGG2013A_EPOCH_2010)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1256')
Defined by the equipotential surface W0 = 62,636,856.0 m^2s^-2, which by convention represents the coastal mean sea level for North America, realized through CGG2013a at epoch 2010.0. Geoid velocity defined as zero with respect to NAD83(CSRS).
Replaces CGVD2013(CGG2013). CGVD2013(CGG2013a) is a static datum. However heights referenced to it change with time, primarily due to glacial isostasy. In practice static snapshots are used at epochs 2010.0 (this datum), 2002.0 and 1997.0.
Cape
Datum::fromSRID(Datum::EPSG_CAPE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6222')
Fundamental point: Buffelsfontein. Latitude: 33°59’32.000”S, longitude: 25°30’44.622”E (of Greenwich).
Carthage
Datum::fromSRID(Datum::EPSG_CARTHAGE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6223')
Fundamental point: Carthage. Latitude: 40.9464506g = 36°51’06.50”N, longitude: 8.8724368g E of Paris = 10°19’20.72”E (of Greenwich).
Fundamental point astronomic coordinates determined in 1878.
Carthage (Paris)
Datum::fromSRID(Datum::EPSG_CARTHAGE_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6816')
Fundamental point: Carthage. Latitude: 40.9464506g N, longitude: 8.8724368g E (of Paris).
Fundamental point astronomic coordinates determined in 1878.
Cascais
Datum::fromSRID(Datum::EPSG_CASCAIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5178')
Mean Sea Level at Cascais 1938.
Orthometric heights.
Caspian Sea
Datum::fromSRID(Datum::EPSG_CASPIAN_SEA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5106')
Defined as -28.0m Baltic datum
Catania 1965
Datum::fromSRID(Datum::EPSG_CATANIA_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1306')
Mean Sea Level at Catania in 1965.
Orthometric heights.
Cayman Brac Vertical Datum 1961
Datum::fromSRID(Datum::EPSG_CAYMAN_BRAC_VERTICAL_DATUM_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1099')
Cayman Islands Geodetic Datum 2011
Datum::fromSRID(Datum::EPSG_CAYMAN_ISLANDS_GEODETIC_DATUM_2011)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1100')
ITRF2005 at epoch 2011.0
Replaces GCGD59 (datum code 6723) and SIGD61 (datum code 6726).
Centre Spatial Guyanais 1967
Datum::fromSRID(Datum::EPSG_CENTRE_SPATIAL_GUYANAIS_1967)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6623')
Fundamental point: Kourou-Diane. Latitude: 5°15’53.699”N, longitude: 52°48’09.149”W (of Greenwich).
Replaced by RGFG95 (code 6624).
Ceuta 2
Datum::fromSRID(Datum::EPSG_CEUTA_2)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1285')
Mean Sea Level at Ceuta harbour between March 1944 and December 2006.
Orthometric heights. Replaces an earlier vertical datum in Ceuta harbour measured between 1908 and 1927.
Chart Datum UK & Ireland VORF08
Datum::fromSRID(Datum::EPSG_CHART_DATUM_UK_AND_IRELAND_VORF08)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1331')
CD UK & Ireland VORF08 is defined by the Vertical Offshore Reference Frame v2.11 2008.
By international agreement, Chart Datum is defined as a level so low that the tide will not frequently fall below it. In the United Kingdom and Ireland, this level is normally the level of approximate Lowest Astronomical Tide.
Chatham Islands Datum 1971
Datum::fromSRID(Datum::EPSG_CHATHAM_ISLANDS_DATUM_1971)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6672')
Replaced by Chatham Islands Datum 1979 (code 6673).
Chatham Islands Datum 1979
Datum::fromSRID(Datum::EPSG_CHATHAM_ISLANDS_DATUM_1979)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6673')
Fundamental point: station Astro. Latitude: 43°57’23.60”S, longitude: 176°34’28.65”W (of Greenwich).
Replaces Chatham Islands Datum 1971 (code 6672). Replaced by New Zealand Geodetic Datum 2000 (code 6167) from March 2000.
China 2000
Datum::fromSRID(Datum::EPSG_CHINA_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1043')
ITRF97 at epoch 2000.0
Combined adjustment of astro-geodetic observations as used for Xian 1980 and GPS control network observed 2000-2003. Adopted July 2008.
Chos Malal 1914
Datum::fromSRID(Datum::EPSG_CHOS_MALAL_1914)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6160')
Chos Malal police station.
Also known as Quini-Huao. Replaced by Campo Inchauspe (code 6221) for topographic mapping, use for oil exploration and production continues.
Chua
Datum::fromSRID(Datum::EPSG_CHUA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6224')
Fundamental point: Chua. Latitude: 19°45’41.160”S, longitude: 48°06’07.560”W (of Greenwich).
The Chua origin and associated network is in Brazil with a connecting traverse through northern Paraguay. It was used in Brazil only as input into the Corrego Allegre adjustment and for government work in Distrito Federal.
Cocos Islands 1965
Datum::fromSRID(Datum::EPSG_COCOS_ISLANDS_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6708')
Fundamental point: Anna 1.
Combani 1950
Datum::fromSRID(Datum::EPSG_COMBANI_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6632')
Combani South Base.
Replaced by RGM04 and Cadastre 1997 (datum codes 1036-37).
Conakry 1905
Datum::fromSRID(Datum::EPSG_CONAKRY_1905)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6315')
Fundamental point: Conakry. Latitude: 10.573766g N, longitude: 17.833682g W (of Paris).
Congo 1960 Pointe Noire
Datum::fromSRID(Datum::EPSG_CONGO_1960_POINTE_NOIRE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6282')
Fundamental point: Point Noire Astro. Latitude: 4°47’00.10”S, longitude: 11°51’01.55”E (of Greenwich).
Constanta
Datum::fromSRID(Datum::EPSG_CONSTANTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5179')
Mean Sea Level at Constanta.
Normal-orthometric heights.
Corrego Alegre 1961
Datum::fromSRID(Datum::EPSG_CORREGO_ALEGRE_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1074')
Fundamental point: Corrego Alegre. Latitude: 19°50’14.91”S, longitude: 48°57’41.98”W (of Greenwich).
Replaced by Corrego Alegre 1970-72 (datum code 6225). NIMA gives coordinates of origin as latitude: 19°50’15.14”S, longitude: 48°57’42.75”W.
Corrego Alegre 1970-72
Datum::fromSRID(Datum::EPSG_CORREGO_ALEGRE_1970_72)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6225')
Fundamental point: Corrego Alegre. Latitude: 19°50’14.91”S, longitude: 48°57’41.98”W (of Greenwich).
Replaces 1961 adjustment (datum code 1074). Superseded by SAD69. NIMA gives coordinates of origin as latitude: 19°50’15.14”S, longitude: 48°57’42.75”W; these may refer to 1961 adjustment.
Costa Rica 2005
Datum::fromSRID(Datum::EPSG_COSTA_RICA_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1065')
ITRF2000 at epoch 2005.83. Network of 34 GPS stations throughout the country, five of which were connected to four Caribbean area ITRF stations.
Replaces Ocotepeque (datum code 1070) in Costa Rica from March 2007.
Croatian Terrestrial Reference System
Datum::fromSRID(Datum::EPSG_CROATIAN_TERRESTRIAL_REFERENCE_SYSTEM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6761')
Densification of ETRS89 in Croatia at epoch 1995.55.
Based on 78 control points with coordinates determined in ETRS89.
Croatian Vertical Reference Datum 1971
Datum::fromSRID(Datum::EPSG_CROATIAN_VERTICAL_REFERENCE_DATUM_1971)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5207')
Mean sea level at five tide gauges in Dubrovnik, Split, Bakar, Rovinj and Kopar at epoch 1971.5
Replaces Trieste (datum code 1050).
Cyprus Geodetic Reference System 1993
Datum::fromSRID(Datum::EPSG_CYPRUS_GEODETIC_REFERENCE_SYSTEM_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1112')
Station Chionistra (Mount Troodos). Network scale and orientation determined by connection of six stations to ITRF91 in Europe at epoch 1993.1.
Survey plans and maps produced by DLS after 1993.
Dabola 1981
Datum::fromSRID(Datum::EPSG_DABOLA_1981)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6155')
Danger 1950
Datum::fromSRID(Datum::EPSG_DANGER_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5190')
Marker near tide gauge at port of Saint Pierre. Height is 1.26 metres above zero of tide gauge.
Dansk Normal Nul
Datum::fromSRID(Datum::EPSG_DANSK_NORMAL_NUL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5132')
Mean Sea Level at 10 gauges.
Orthometric heights.
Dansk Vertikal Reference 1990
Datum::fromSRID(Datum::EPSG_DANSK_VERTIKAL_REFERENCE_1990)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5206')
Benchmark at Århus cathedral referenced to mean sea level determined during 1990 at 10 tide gauges: Esbjerg, Fredericia, Frederikshavn, Gedser, Hirtshals, Hornbæk, Korsør, København, Slipshavn and Århus.
Normal Orthometric heights.
Datum 73
Datum::fromSRID(Datum::EPSG_DATUM_73)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6274')
Fundamental point: TF4, Melrica. Latitude: 39°41’37.30”N, longitude: 8°07’53.31”W (of Greenwich).
Datum Altimetrico de Costa Rica 1952
Datum::fromSRID(Datum::EPSG_DATUM_ALTIMETRICO_DE_COSTA_RICA_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1226')
Mean Sea Level 1941-1952 at Puntarenas.
Orthometric heights.
Datum Geodesi Nasional 1995
Datum::fromSRID(Datum::EPSG_DATUM_GEODESI_NASIONAL_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6755')
ITRF91at epoch 1992.0.
Replaces ID74 and all older datums.
Dealul Piscului 1930
Datum::fromSRID(Datum::EPSG_DEALUL_PISCULUI_1930)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6316')
Fundamental point: latitude 44°24’33.9606”N, longitude 26°06’44.8772”E (of Greenwich).
Replaced by Pulkovo 1942(58) (datum code 6179)
Deception Island
Datum::fromSRID(Datum::EPSG_DECEPTION_ISLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6736')
Deir ez Zor
Datum::fromSRID(Datum::EPSG_DEIR_EZ_ZOR)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6227')
Fundamental point: Trig. 254 Deir. Latitude: 35°21’49.975”N, longitude: 40°05’46.770”E (of Greenwich).
Deutsche Bahn Reference System
Datum::fromSRID(Datum::EPSG_DEUTSCHE_BAHN_REFERENCE_SYSTEM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1081')
Defined by transformation from ETRS89 (transformation code 5826) to be an average of DHDN realizations across all German states.
Deutsches Hauptdreiecksnetz
Datum::fromSRID(Datum::EPSG_DEUTSCHES_HAUPTDREIECKSNETZ)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6314')
Fundamental point: Rauenberg. Latitude: 52°27’12.021”N, longitude: 13°22’04.928”E (of Greenwich). This station was destroyed in 1910 and the station at Potsdam substituted as the fundamental point.
Deutsches Haupthoehennetz 1912
Datum::fromSRID(Datum::EPSG_DEUTSCHES_HAUPTHOEHENNETZ_1912)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1161')
Height of reference point “Normalnullpunkt” at Berlin Observatory defined as 37.000m above MSL in 1879 (transferred to benchmarks near Hoppegarten in Müncheberg in 1912). Datum at Normaal Amsterdams Peil (NAP) is mean high tide in 1684.
Uses Normal-orthometric heights.
Deutsches Haupthoehennetz 1985
Datum::fromSRID(Datum::EPSG_DEUTSCHES_HAUPTHOEHENNETZ_1985)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5182')
Network adjusted in 1985. Height of reference point Wallenhorst defined as value from 1928 adjustment. Datum at Normaal Amsterdams Peil (NAP) is mean high tide in 1684.
Replaced by DHHN92. Uses Normal-orthometric heights.
Deutsches Haupthoehennetz 1992
Datum::fromSRID(Datum::EPSG_DEUTSCHES_HAUPTHOEHENNETZ_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5181')
Network adjusted in 1992. Geopotential number at reference point Wallenhorst defined as value from the UELN-73/86 adjustment. Datum at Normaal Amsterdams Peil (NAP) is mean high tide in 1684.
Replaces DHHN85 in West Germany and SNN76 in East Germany. Uses Normal heights.
Deutsches Haupthoehennetz 2016
Datum::fromSRID(Datum::EPSG_DEUTSCHES_HAUPTHOEHENNETZ_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1170')
2006-2012 levelling network adjusted to 72 points of the DHHN92. Datum at Normaal Amsterdams Peil (NAP) is mean high tide in 1684.
Uses Normal heights in the mean tidal system.
Diego Garcia 1969
Datum::fromSRID(Datum::EPSG_DIEGO_GARCIA_1969)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6724')
Fundamental point: ISTS 073.
Dominica 1945
Datum::fromSRID(Datum::EPSG_DOMINICA_1945)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6602')
Fundamental point: station M12.
Douala 1948
Datum::fromSRID(Datum::EPSG_DOUALA_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6192')
South pillar of Douala base; 4°00’40.64”N, 9°42’30.41”E (of Greenwich).
Replaced by Manoca 1962 datum (code 6193).
Douglas
Datum::fromSRID(Datum::EPSG_DOUGLAS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5148')
Mean Sea Level at Douglas 1865. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights.
Dunedin 1958
Datum::fromSRID(Datum::EPSG_DUNEDIN_1958)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5159')
MSL at Dunedin harbour 1918-1937.
Dunedin-Bluff 1960
Datum::fromSRID(Datum::EPSG_DUNEDIN_BLUFF_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1040')
Common adjustment of Dunedin 1958 and Bluff 1955 networks.
Durres
Datum::fromSRID(Datum::EPSG_DURRES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5175')
Mean Sea Level at Durres.
Normal-orthometric heights.
EBBWV14 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_EBBWV14_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1319')
Defined through the application of the EBBWV14 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2022 to support intermediate CRS “EBBWV14-IRF” in the emulation of the EBBWV14 Snake map projection.
ECML14_NB Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_ECML14_NB_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1310')
Defined through the application of the ECML14_NB NTv2 transformation (code 9759) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2021 to support intermediate CRS “ECML14_NB-IRF” in the emulation of the ECML14_NB Snake map projection.
EGM2008 geoid
Datum::fromSRID(Datum::EPSG_EGM2008_GEOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1027')
Derived through EGM2008 geoid undulation model consisting of spherical harmonic coefficients to degree 2190 and order 2159 applied to the WGS 84 ellipsoid.
Replaces EGM96 geoid (datum code 5171). See transformation codes 3858 and 3859 for 2.5x2.5 and 1x1 arc minute geoid undulation grid files derived from the spherical harmonic coefficients.
EGM84 geoid
Datum::fromSRID(Datum::EPSG_EGM84_GEOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5203')
Derived through EGM84 geoid undulation model consisting of spherical harmonic coefficients to degree and order 180 applied to the WGS 84 ellipsoid.
Replaced by EGM96 geoid (datum code 5171).
EGM96 geoid
Datum::fromSRID(Datum::EPSG_EGM96_GEOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5171')
Derived through EGM84 geoid undulation model consisting of spherical harmonic coefficients to degree and order 360 applied to the WGS 84 ellipsoid.
Replaces EGM84 geoid (datum code 5203). Replaced by EGM2008 geoid (datum code 1027).
EOS21 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_EOS21_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1308')
Defined through the application of the EOS21 NTv2 transformation (code 9740) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2021 to support intermediate CRS “EOS21-IRF” in the emulation of the EOS21 Snake map projection.
ETRF2000 Poland
Datum::fromSRID(Datum::EPSG_ETRF2000_POLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1305')
Polish densification of ETRS89 realized through adjustment of ASG-EUPOS network constrained to 35 EPN stations in ETRF2000@2011.0.
Adopted as official Polish reference frame from 2012-12-01 through Ordinance of the Council of Ministers of 15th November 2012 on the state system of spatial reference system.
EWR2 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_EWR2_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1311')
Defined through the application of the EWR2 NTv2 transformation (code 9763) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2021 to support intermediate CRS “EWR2-IRF” in the emulation of the EWR2 Snake map projection.
Easter Island 1967
Datum::fromSRID(Datum::EPSG_EASTER_ISLAND_1967)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6719')
Egypt 1907
Datum::fromSRID(Datum::EPSG_EGYPT_1907)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6229')
Fundamental point: Station F1 (Venus). Latitude: 30°01’42.86”N, longitude: 31°16’33.60”E (of Greenwich).
Egypt 1930
Datum::fromSRID(Datum::EPSG_EGYPT_1930)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6199')
Fundamental point: Station F1 (Venus). Latitude: 30°01’42.86”N, longitude: 31°16’37.05”E (of Greenwich).
Note that Egypt 1930 uses the International 1924 ellipsoid, unlike the Egypt 1907 datum (code 6229) which uses the Helmert ellipsoid. Oil industry references to the Egypt 1930 datum name and the Helmert ellipsoid probably mean Egypt 1907 datum.
Egypt Gulf of Suez S-650 TL
Datum::fromSRID(Datum::EPSG_EGYPT_GULF_OF_SUEZ_S_650_TL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6706')
Fundamental point: Station S-650 DMX. Adopted coordinates: latitude: 28°19’02.1907”N, longitude: 33°06’36.6344”E (of Greenwich). The proper Egypt 1907 coordinates for S-650 differ from these by about 20m.
A coherent set of stations bordering the Gulf of Suez coordinated by Transit translocation (“TL”) between 1980 and 1984. Based on incorrect Egypt 1907 values for origin station S-650. Differs from true Egypt 1907 by approximately 20m.
El Hierro
Datum::fromSRID(Datum::EPSG_EL_HIERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1284')
Mean Sea Level at La Estaca harbour in 2000.
Orthometric heights.
Estonia 1992
Datum::fromSRID(Datum::EPSG_ESTONIA_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6133')
Densification from 4 ETRS89 points.
Based on ETRS89 as established during the 1992 Baltic campaign. Replaced by Estonia 1997 adjustment (code 6180).
Estonia 1997
Datum::fromSRID(Datum::EPSG_ESTONIA_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6180')
Densification of ETRS89 during EUREF-ESTONIA97 campaign through transformation from ITRF96 at epoch 1997.56.
Replaces Estonia 1992 adjustment (code 6133).
Estonian Height System 2000
Datum::fromSRID(Datum::EPSG_ESTONIAN_HEIGHT_SYSTEM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1298')
Estonian realisation of EVRF2007. Relevelling observed 2004-2013 and reduced to epoch 2000 using the NKG2005LU empirical land uplift model. EVRF2007 height of Poltsamaa fundamental bench mark (H=55.2114m) held fixed.
Uses Normal heights.
European Datum 1950
Datum::fromSRID(Datum::EPSG_EUROPEAN_DATUM_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6230')
Fundamental point: Potsdam (Helmert Tower). Latitude: 52°22’51.4456”N, longitude: 13°03’58.9283”E (of Greenwich).
European Datum 1950(1977)
Datum::fromSRID(Datum::EPSG_EUROPEAN_DATUM_1950_1977)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6154')
Extension of ED50 over Iran.
Sometimes referred to as ED50-ED77.
European Datum 1979
Datum::fromSRID(Datum::EPSG_EUROPEAN_DATUM_1979)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6668')
Fundamental point: Potsdam (Helmert Tower). Latitude: 52°22’51.4456”N, longitude: 13°03’58.9283”E (of Greenwich).
Replaced by 1987 adjustment.
European Datum 1987
Datum::fromSRID(Datum::EPSG_EUROPEAN_DATUM_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6231')
Fundamental point: Potsdam (Helmert Tower). Latitude: 52°22’51.4456”N, longitude: 13°03’58.9283”E (of Greenwich).
European Libyan Datum 1979
Datum::fromSRID(Datum::EPSG_EUROPEAN_LIBYAN_DATUM_1979)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6159')
Extension of ED50 over Libya.
European Terrestrial Reference Frame 1989
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1989)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1178')
Coincides with ITRF89 at epoch 1989.0. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the AM02 geophysical model.
Defined by transformation from ITRF89 (CT code 7932). Replaced by ETRF90 (datum code 1179).
European Terrestrial Reference Frame 1990
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1990)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1179')
Coincides with ITRF90 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the AM02 geophysical model.
Defined by transformation from ITRF90 (CT code 7933). Replaces ETRF89 (datum code 1178). Replaced by ETRF91 (datum code 1180).
European Terrestrial Reference Frame 1991
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1991)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1180')
Coincides with ITRF91 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the AM02 geophysical model.
Defined by transformation from ITRF91 (CT code 7934). Replaces ETRF90 (datum code 1179). Replaced by ETRF92 (datum code 1181).
European Terrestrial Reference Frame 1992
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1181')
Coincides with ITRF92 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the NNR-NUVEL-1 geophysical model.
Defined by transformation from ITRF92 (CT code 7935). Replaces ETRF91 (datum code 1180). Replaced by ETRF93 (datum code 1182).
European Terrestrial Reference Frame 1993
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1182')
Coincides with ITRF93 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the ITRF93 velocity field.
Defined by transformation from ITRF93 (CT code 7936). Replaces ETRF92 (datum code 1181). Replaced by ETRF94 (datum code 1183).
European Terrestrial Reference Frame 1994
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1994)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1183')
Coincides with ITRF94 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the NNR-NUVEL-1A geophysical model.
Defined by transformation from ITRF94 (CT code 7937). Replaces ETRF93 (datum code 1182). Replaced by ETRF96 (datum code 1184).
European Terrestrial Reference Frame 1996
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1184')
Coincides with ITRF96 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the NNR-NUVEL-1A geophysical model.
Defined by transformation from ITRF96 (CT code 7938). Replaces ETRF94 (datum code 1183). Replaced by ETRF97 (datum code 1185).
European Terrestrial Reference Frame 1997
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1185')
Coincides with ITRF97 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the NNR-NUVEL-1A geophysical model.
Defined by transformation from ITRF97 (CT code 7939). Replaces ETRF96 (datum code 1184). Replaced by ETRF2000 (datum code 1186).
European Terrestrial Reference Frame 2000
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1186')
Coincides with ITRF2000 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the ITRF2000 velocity field.
Defined by transformation from ITRF2000 (CT 7940). Replaces ETRF97. On the publication of ETRF2005 the EUREF TWG recommended that ETRF2000 be the realization of ETRS89. ETRF2014 (code 1206) is technically superior to all earlier realizations of ETRS89.
European Terrestrial Reference Frame 2005
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1204')
Coincides with ITRF2005 in orientation and scale at epoch 1989.0 realigned to ITRF89 at epoch 1989.0 using 3 translations. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the ITRF2005 velocity field.
Defined by transformation from ITRF2005 (CT 5900). On publication in 2007 of this reference frame, the EUREF TWG recommended that ETRF2000 rather than this reference frame remained as the preferred realization of ETRS89. Replaced by ETRF2014 (code 1206).
European Terrestrial Reference Frame 2014
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_FRAME_2014)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1206')
Coincides with ITRF2014 at epoch 1989.0. Fixed to the stable part of the Eurasian tectonic plate through 3 rotation rates derived from the ITRF2014 velocity field.
Defined by transformation from ITRF2014 (CT code 8366). Replaces ETRF2005 (datum code 1204). Technically superior to ETRF2000 (datum code 1186).
European Terrestrial Reference System 1989 ensemble
Datum::fromSRID(Datum::EPSG_EUROPEAN_TERRESTRIAL_REFERENCE_SYSTEM_1989_ENSEMBLE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6258')
Has been realized through ETRF89, ETRF90, ETRF91, ETRF92, ETRF93, ETRF94, ETRF96, ETRF97, ETRF2000, ETRF2005 and ETRF2014. This ‘ensemble’ covers any or all of these realizations without distinction.
European Vertical Reference Frame 2000
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5129')
Height at Normaal Amsterdams Peil (NAP) is zero, defined through height at UELN bench mark 13600 (52°22’53”N 4°54’34”E) of 0.71599m. Datum at NAP is mean high tide in 1684.
Realized by geopotential numbers and Normal heights of the United European Levelling Network. Replaced by EVRF2007 (datum code 5215).
European Vertical Reference Frame 2000 Austria
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2000_AUSTRIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1261')
Geopotential numbers of the EVRF2000 (UELN95/98) node points in Austria converted to orthometric heights using a digital surface model.
Geoid surface is smoother than the EVRF2000 quasigeoid.
European Vertical Reference Frame 2007
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2007)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5215')
Least squares fit to 13 stations of the EVRF2000 solution. Reduced to epoch 2000.0 for Nordic countries using the NKG2005LU uplift model.
Realized by geopotential numbers and Normal heights of the United European Levelling Network. Replaces EVRF2000 (datum code 5129). Replaced by EVRF2019 (datum code 1274).
European Vertical Reference Frame 2007 Poland
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2007_POLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1297')
Origin: Mean North Sea Level at Amsterdam tide gauge. Normal heights obtained from adjustment of precise leveling campaigns conducted during 1998 - 2012 reduced to epoch 2008.00.
Uses Normal heights.
European Vertical Reference Frame 2019
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2019)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1274')
Fixed to geopotential values of 12 stable stations of the EVRF2007 solution. Re-adjusted in September 2020. Reduced to epoch 2000.0 for Nordic countries and Russia using the NKG2016LU_lev uplift model and for Switzerland using CHVRF15 velocities.
Following EVRS conventions, EVRF2019 is a zero-tide surface. Replaces EVRF2007 (datum code 5215).
European Vertical Reference Frame 2019 mean tide
Datum::fromSRID(Datum::EPSG_EUROPEAN_VERTICAL_REFERENCE_FRAME_2019_MEAN_TIDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1287')
Derived from 2020-09 zero-tide EVRF2019 adjustment by Cmean = Czero + (0.28841*sin^2(phi)) + (0.00195*sin^4(phi)) - 0.09722 - 0.08432 kgal.m. The offset of 0.08432 forces the mean-tide height to the zero-tide height at the EVRF2000 origin in Amsterdam.
Mean-tide surface, describing how water flows. See EVRF2019 (datum code 1274) for zero-tide surface which is consistent with ETRS conventions.
FNL22 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_FNL22_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1321')
Defined through the application of the FNL22 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2022 to support intermediate CRS “FNL22” in the emulation of the FNL22 Snake map projection.
Fahud
Datum::fromSRID(Datum::EPSG_FAHUD)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6232')
Fundamental point: Station NO68-024 Fahud. Latitude: 22°17’31.182”N, longitude: 56°29’18.820”E (of Greenwich).
Replaced by PSD93 (code 6134).
Fahud Height Datum
Datum::fromSRID(Datum::EPSG_FAHUD_HEIGHT_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5124')
Single MSL determination at Mina Al Fahal.
Based on reciprocal trigonometric heighting. Replaced by PHD93 Datum (code 5123) in 1993.
Fair Isle
Datum::fromSRID(Datum::EPSG_FAIR_ISLE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5139')
Orthometric heights.
Famagusta 1960
Datum::fromSRID(Datum::EPSG_FAMAGUSTA_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1148')
Mean sea level at Famagusta Harbour.
Orthometric heights.
Fao
Datum::fromSRID(Datum::EPSG_FAO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5149')
Established by Hunting Surveys for IPC. In Iran replaced by Bandar Abbas (code 5150). At time of record creation NIOC data in Ahwaz area still usually referenced to Fao. In Iraq replaced by Fao 1979 (code 1028).
Fao 1979
Datum::fromSRID(Datum::EPSG_FAO_1979)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1028')
Average sea level at Fao during two-year period in mid/late 1970s.
Levelling network established by Polservice consortium. Replaces Fao (datum code 5149) in Iraq.
Faroe Datum 1954
Datum::fromSRID(Datum::EPSG_FAROE_DATUM_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6741')
Astronomical observations at 3 points.
Replaced by ED50 in late 1970’s for all purposes other than cadastre. Replaced by fk89 for cadastre.
Faroe Islands Vertical Reference 2009
Datum::fromSRID(Datum::EPSG_FAROE_ISLANDS_VERTICAL_REFERENCE_2009)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1059')
Mean Tidal Height System.
Fatu Iva 72
Datum::fromSRID(Datum::EPSG_FATU_IVA_72)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6688')
Fundamental point: Latitude: 9°25’58.00”S, longitude: 138°55’06.25”W (of Greenwich).
Recomputed by IGN in 1972 using origin and observations of 1953-1955 Mission Hydrographique des Establissements Francais d’Oceanie (MHEFO 55). Replaced by RGPF (datum code 6687).
Fehmarnbelt Datum 2010
Datum::fromSRID(Datum::EPSG_FEHMARNBELT_DATUM_2010)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1078')
ITRF2005 at epoch 2010.14.
Defined through coordinates of four permanant GNSS stations.
Fehmarnbelt Vertical Reference 2010
Datum::fromSRID(Datum::EPSG_FEHMARNBELT_VERTICAL_REFERENCE_2010)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1079')
Realised by precise levelling between tide gauges at Marienleuchte (Germany), Rodbyhavn (Denmark) and four Fehmarnbelt project GNSS stations.
Fiji 1956
Datum::fromSRID(Datum::EPSG_FIJI_1956)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6721')
Latitude origin was obtained astronomically at station Rasusuva = 17°49’03.13”S, longitude origin was obtained astronomically at station Suva = 178°25’35.835”E (of Greenwich).
For topographic mapping replaces Viti Levu 1912 and Vanua Levu 1915. Replaced by Fiji Geodetic Datum 1986.
Fiji Geodetic Datum 1986
Datum::fromSRID(Datum::EPSG_FIJI_GEODETIC_DATUM_1986)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6720')
NWL 9D coordinates of 6 stations on Vitu Levu and Vanua Levu.
Replaces Viti Levu 1912, Vanua Levu 1915 and Fiji 1956.
Final Datum 1958
Datum::fromSRID(Datum::EPSG_FINAL_DATUM_1958)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6132')
Fundamental point: Maniyur. Latitude: 31°23’59.19”N, longitude: 48°32’31.38”E (of Greenwich).
Network included in Nahrwan 1967 adjustment.
Flannan Isles
Datum::fromSRID(Datum::EPSG_FLANNAN_ISLES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5146')
Orthometric heights.
Fort Marigot
Datum::fromSRID(Datum::EPSG_FORT_MARIGOT)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6621')
Replaced by RRAF 1991 (datum code 1047).
Foula
Datum::fromSRID(Datum::EPSG_FOULA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5141')
Orthometric heights.
Fuerteventura
Datum::fromSRID(Datum::EPSG_FUERTEVENTURA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1279')
Mean Sea Level at Puerto del Rosario harbour between 1999-09-08 and 2000-12-31.
Orthometric heights.
GBK19 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_GBK19_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1289')
Defined through the application of the GBK19 NTv2 transformation (code 9454) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2020 to support intermediate CRS “GBK19-IRF” in the emulation of the combined GBK19 Snake map projection.
GNTRANS
Datum::fromSRID(Datum::EPSG_GNTRANS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1316')
Surface defined by the EGG97 quasi-geoid model modified in GNTRANS to achieve absolute position optimised for use with DB_REF.
Implemented in GNTRANS. The GNTRANS height surface is available only through the GNTRANS application. Replaced by the GNTRANS2016 height surface (datum code 1318).
GNTRANS2016
Datum::fromSRID(Datum::EPSG_GNTRANS2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1318')
Surface defined by the GCG2016 quasi-geoid model applied to ETRS89.
Approximates the national DHHN2016 levelling surface to around 1cm in lowlands and 2cm in high mountains, but unlike DHHN2016 it is defined by the GCG2016 geoid model. Like DHHN2016, uses Normal heights in the mean tide system.
Gambia
Datum::fromSRID(Datum::EPSG_GAMBIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1139')
Gan 1970
Datum::fromSRID(Datum::EPSG_GAN_1970)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6684')
In some references incorrectly named “Gandajika 1970”. See datum code 6685.
Garoua
Datum::fromSRID(Datum::EPSG_GAROUA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6197')
Fundamental point: IGN astronomical station and benchmark no. 16 at Tongo. Latitude 8°55’08.74”N, longitude 13°30’43.19”E (of Greenwich).
Gebrauchshohen ADRIA
Datum::fromSRID(Datum::EPSG_GEBRAUCHSHOHEN_ADRIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5176')
Reference point Hutbiegl defined relative to mean sea level at Trieste in 1875.
Normal-orthometric heights.
Genoa 1942
Datum::fromSRID(Datum::EPSG_GENOA_1942)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1051')
Mean Sea Level at Genoa (Ponte Morosini) 1937-1946.
Orthometric heights.
Geocentric Datum Brunei Darussalam 2009
Datum::fromSRID(Datum::EPSG_GEOCENTRIC_DATUM_BRUNEI_DARUSSALAM_2009)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1056')
ITRF2005 at epoch 2009.45
Replaces use of Timbalai from July 2009.
Geocentric Datum of Australia 1994
Datum::fromSRID(Datum::EPSG_GEOCENTRIC_DATUM_OF_AUSTRALIA_1994)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6283')
ITRF92 at epoch 1994.0.
Geocentric Datum of Australia 2020
Datum::fromSRID(Datum::EPSG_GEOCENTRIC_DATUM_OF_AUSTRALIA_2020)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1168')
ITRF2014 at epoch 2020.0.
Geocentric datum of Korea
Datum::fromSRID(Datum::EPSG_GEOCENTRIC_DATUM_OF_KOREA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6737')
ITRF2000 at epoch 2002.0.
Geodetic Datum of 1965
Datum::fromSRID(Datum::EPSG_GEODETIC_DATUM_OF_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6300')
Adjusted to best mean fit 9 stations of the OSNI 1952 primary adjustment in Northern Ireland plus the 1965 values of 3 stations in the Republic of Ireland.
Differences from the 1965 adjustment (datum code 6299) are: average difference in Eastings 0.092m; average difference in Northings 0.108m; maximum vector difference 0.548m.
Geodetic Datum of Malaysia 2000
Datum::fromSRID(Datum::EPSG_GEODETIC_DATUM_OF_MALAYSIA_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6742')
ITRF2000, epoch 2000.0.
Replaces all older Malaysian datums.
Geodezicheskaya Sistema Koordinat 2011
Datum::fromSRID(Datum::EPSG_GEODEZICHESKAYA_SISTEMA_KOORDINAT_2011)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1159')
Coordinates of the Russian fundamental astronomic-geodetic network (about 50 stations) at epoch 2011.0
Gisborne 1926
Datum::fromSRID(Datum::EPSG_GISBORNE_1926)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5160')
MSL at Gisborne harbour 1926.
Gran Canaria
Datum::fromSRID(Datum::EPSG_GRAN_CANARIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1280')
Mean Sea Level at Las Palmas de Gran Canaria harbour between 1992 and 1997.
Orthometric heights.
Grand Cayman Geodetic Datum 1959
Datum::fromSRID(Datum::EPSG_GRAND_CAYMAN_GEODETIC_DATUM_1959)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6723')
Fundamental point: GC1. Latitude: 19°17’54.43”N, longitude: 81°22’37.17”W (of Greenwich).
Replaced by CIGD11 (datum code 1100).
Grand Cayman Vertical Datum 1954
Datum::fromSRID(Datum::EPSG_GRAND_CAYMAN_VERTICAL_DATUM_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1097')
Grand Comoros
Datum::fromSRID(Datum::EPSG_GRAND_COMOROS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6646')
Fundamental point: M’Tsaoueni. Latitude: 11°28’32.200”S, longitude: 43°15’42.315”E (of Greenwich).
Greek
Datum::fromSRID(Datum::EPSG_GREEK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6120')
Fundamental point: Athens Observatory. Latitude 37°58’20.132”N, longitude 23°42’58.815”E (of Greenwich)
See geodetic datum alias 6404. Used as basis of topographic mapping based on Hatt projection. Replaced by GGRS87 (code 6121).
Greek (Athens)
Datum::fromSRID(Datum::EPSG_GREEK_ATHENS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6815')
Fundamental point: Athens Observatory. Latitude 37°58’20.132”N, longitude 0°E (of Athens).
See geodetic datum alias 6404. Used as basis of topographic mapping based on Hatt projection.
Greek Geodetic Reference System 1987
Datum::fromSRID(Datum::EPSG_GREEK_GEODETIC_REFERENCE_SYSTEM_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6121')
Fundamental point: Dionysos. Latitude 38°04’33.8”N, longitude 23°55’51.0”E of Greenwich; geoid height 7.0 m.
Replaced (old) Greek datum. Oil industry work based on ED50.
Greenland 1996
Datum::fromSRID(Datum::EPSG_GREENLAND_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6747')
ITRF94 at epoch 1996.62
Replaces Ammassalik 1958, Qornoq 1927 and Scoresbysund 1952.
Greenland Vertical Reference 2000
Datum::fromSRID(Datum::EPSG_GREENLAND_VERTICAL_REFERENCE_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1199')
Defined through the gravimetric geoid 2000 model locally aligned with MSL at a number of sites.
Orthometric heights. Replaced by GVR2016.
Greenland Vertical Reference 2016
Datum::fromSRID(Datum::EPSG_GREENLAND_VERTICAL_REFERENCE_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1200')
Defined through the gravimetric geoid 2016 model locally aligned to MSL as measured at Nuuk during the 1960s.
Orthometric heights. Replaces GVR2000.
Grenada 1953
Datum::fromSRID(Datum::EPSG_GRENADA_1953)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6603')
Fundamental point: station GS8, Sante Marie.
Guadeloupe 1948
Datum::fromSRID(Datum::EPSG_GUADELOUPE_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6622')
Replaced by RRAF 1991 (datum code 1047).
Guadeloupe 1951
Datum::fromSRID(Datum::EPSG_GUADELOUPE_1951)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5193')
Mean sea level July 1947 to June 1948 at Pointe-Fouillole (Pointe-à-Pitre harbour). Origin = marker AO’-12 with height of 1.917m above msl.
Orthometric heights. Replaced by Guadeloupe 1988 (datum code 5155). Guadeloupe 1951 height 0.00m is 0.629m above 1947-48 sounding datum.
Guadeloupe 1988
Datum::fromSRID(Datum::EPSG_GUADELOUPE_1988)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5155')
Mean sea level July 1947 to June 1948 at Pointe-Fouillole (Pointe-à-Pitre harbour). Origin = marker GO-7 (formerly AO’-5) with defined height of 2.67m above msl adopted from 1951 value. Guadeloupe 1988 height 0.00m is 0.46m above 1984 sounding datum.
Orthometric heights. Replaces Guadeloupe 1951 (datum code 5193).
Guam 1963
Datum::fromSRID(Datum::EPSG_GUAM_1963)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6675')
Fundamental point: Tagcha. Latitude: 13°22’38.49”N, longitude: 144°45’51.56”E (of Greenwich).
Replaced by NAD83(HARN)
Guam Vertical Datum of 1963
Datum::fromSRID(Datum::EPSG_GUAM_VERTICAL_DATUM_OF_1963)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1122')
Mean sea level at Apra harbor, Guam, 1949-1962. Benchmark NO 5 1949 = 0.599m.
Replaced by Guam vertical datum of 2004 (datum code 1126).
Guam Vertical Datum of 2004
Datum::fromSRID(Datum::EPSG_GUAM_VERTICAL_DATUM_OF_2004)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1126')
Mean sea level at Apra harbor, Guam. Benchmark 1630000 TIDAL 4 = 2.170m relative to US National Tidal Datum Epoch 1983-2001. MSL is 0.419m above MLLW and the BM is 2.589m above MLLW.
Replaces Guam Vertical Datum of 1963 (datum code 1122).
Gulshan 303
Datum::fromSRID(Datum::EPSG_GULSHAN_303)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6682')
Gulshan garden, Dhaka.
Network of more than 140 control points observed and adjusted in 1995 by Japan International Cooperation Agency (JICA).
Gunung Segara
Datum::fromSRID(Datum::EPSG_GUNUNG_SEGARA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6613')
Station P5 (Gunung Segara). Latitude 0°32’12.83”S, longitude 117°08’48.47”E (of Greenwich).
Gunung Segara (Jakarta)
Datum::fromSRID(Datum::EPSG_GUNUNG_SEGARA_JAKARTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6820')
Station P5 (Gunung Segara) 0°32’12.83”S, 117°08’48.47”E (of Greenwich). Longitude 8°20’20.68”E (of Jakarta).
Gusterberg (Ferro)
Datum::fromSRID(Datum::EPSG_GUSTERBERG_FERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1188')
Fundamental point: Gusterberg. Latitude: 48°02’18.47”N, longitude: 31°48’15.05”E (of Ferro).
HS2 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_HS2_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1264')
Defined through application of the HS2TN02 transformation to ETRS89 as realized through OSNet v2001 CORS. Subsequently realized through application of the HS2TN15 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created to support intermediate CRS “HS2-IRF” in the emulation of the HS2P1+14 Snake map projection.
HS2 Vertical Reference Frame
Datum::fromSRID(Datum::EPSG_HS2_VERTICAL_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1265')
Equivalent to Ordnance Datum Newlyn as realized through OSNet v2001 and OSGM02.
After introduction of OSNet v2009 CORS, OSTN15 and the OSGM15 geoid model, the HS2 VRF is maintained equivalent to OSNet v2001 and OSGM02 through HS2GM15 (code 9304).
HULLEE13 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_HULLEE13_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1317')
Defined through the application of the HULLEE13 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2022 to support intermediate CRS “HULLEE13-IRF” in the emulation of the HULLEE13 Snake map projection.
Ha Tien 1960
Datum::fromSRID(Datum::EPSG_HA_TIEN_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5125')
In Vietnam replaced by Hon Dau in 1992.
Hanoi 1972
Datum::fromSRID(Datum::EPSG_HANOI_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6147')
Hartebeesthoek94
Datum::fromSRID(Datum::EPSG_HARTEBEESTHOEK94)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6148')
Coincident with ITRF91 at epoch 1994.0 at Hartebeesthoek astronomical observatory near Pretoria.
Replaces Cape datum (code 6222).
Helle 1954
Datum::fromSRID(Datum::EPSG_HELLE_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6660')
Helsinki 1943
Datum::fromSRID(Datum::EPSG_HELSINKI_1943)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1213')
MSL at Helsinki during 1943.
Uses orthometric heights. Effect of the land uplift during the 2nd national levelling was not taken into account. Replaced by N60 (datum code 5116).
Helsinki 1960
Datum::fromSRID(Datum::EPSG_HELSINKI_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5116')
MSL at Helsinki during 1960.
Uses orthometric heights. Replaced by N2000 (datum code 1030).
Herat North
Datum::fromSRID(Datum::EPSG_HERAT_NORTH)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6255')
Fundamental point: Herat North. Latitude: 34°23’09.08”N, longitude: 64°10’58.94”E (of Greenwich).
High Water
Datum::fromSRID(Datum::EPSG_HIGH_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1094')
Not specific to any location or epoch.
The highest water level reached at a place in one tidal cycle. When used on inland (non-tidal) waters it is generally defined as a level which the daily mean water level exceeds less than 5% of the time.
Higher High Water Large Tide
Datum::fromSRID(Datum::EPSG_HIGHER_HIGH_WATER_LARGE_TIDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1084')
Not specific to any location or epoch.
The average of the highest high waters, one from each of 19 years of observations.
Highest Astronomical Tide
Datum::fromSRID(Datum::EPSG_HIGHEST_ASTRONOMICAL_TIDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1082')
Not specific to any location or epoch.
The highest tide level which can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions.
Hito XVIII 1963
Datum::fromSRID(Datum::EPSG_HITO_XVIII_1963)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6254')
Chile-Argentina boundary survey.
Used in Tierra del Fuego.
Hjorsey 1955
Datum::fromSRID(Datum::EPSG_HJORSEY_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6658')
Fundamental point: Latitude: 64°31’29.26”N, longitude: 22°22’05.84”W (of Greenwich).
Hon Dau 1992
Datum::fromSRID(Datum::EPSG_HON_DAU_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5126')
Replaces Ha Tien in Vietnam.
Hong Kong 1963
Datum::fromSRID(Datum::EPSG_HONG_KONG_1963)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6738')
Fundamental point: Trig “Zero”, 38.4 feet south along the transit circle of the Kowloon Observatory. Latitude 22°18’12.82”N, longitude 114°10’18.75”E (of Greenwich).
Replaced by Hong Kong 1963(67) for military purposes only in 1967. Replaced by Hong Kong 1980.
Hong Kong 1963(67)
Datum::fromSRID(Datum::EPSG_HONG_KONG_1963_67)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6739')
Fundamental point: Trig “Zero”, 38.4 feet south along the transit circle of the Kowloon Observatory. Latitude 22°18’12.82”N, longitude 114°10’18.75”E (of Greenwich).
Replaces Hong Kong 1963 for military purposes only in 1967. Replaced by Hong Kong 1980.
Hong Kong 1980
Datum::fromSRID(Datum::EPSG_HONG_KONG_1980)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6611')
Fundamental point: Trig “Zero”, 38.4 feet south along the transit circle of the Kowloon Observatory. Latitude 22°18’12.82”N, longitude 114°10’18.75”E (of Greenwich).
Replaces Hong Kong 1963 and Hong Kong 1963(67).
Hong Kong Chart Datum
Datum::fromSRID(Datum::EPSG_HONG_KONG_CHART_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5136')
Approximates to Lowest Astronomic Tide level (LAT).
Chart datum is 0.15 metres below Hong Kong Principal Datum (code 5135) and 1.38m below MSL at Quarry Bay.
Hong Kong Geodetic
Datum::fromSRID(Datum::EPSG_HONG_KONG_GEODETIC)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1209')
ITRF96 at epoch 1998.121
Locally sometimes referred to as ITRF96 or WGS 84, these are not strictly correct as it applies only at epoch 1998.121 and ignores subsequent tectonic plate motion.
Hong Kong Principal Datum
Datum::fromSRID(Datum::EPSG_HONG_KONG_PRINCIPAL_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5135')
1.23m below the mean of 19 years (1965-83) observations of tide levels at North Point, Victoria Harbour.
Horta
Datum::fromSRID(Datum::EPSG_HORTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1104')
Mean Sea Level during 1935 at Horta.
Orthometric heights.
Hu Tzu Shan 1950
Datum::fromSRID(Datum::EPSG_HU_TZU_SHAN_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6236')
Fundamental point: Hu Tzu Shan. Latitude: 23°58’32.34”N, longitude: 120°58’25.975”E (of Greenwich).
Huahine SAU 2001
Datum::fromSRID(Datum::EPSG_HUAHINE_SAU_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5200')
Fundamental benchmark: SHOM B3
Included as part of NGPF - see datum code 5195.
Hungarian Datum 1909
Datum::fromSRID(Datum::EPSG_HUNGARIAN_DATUM_1909)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1024')
Fundamental point not given in information source, but presumably Szolohegy which is origin of later HD72.
Replaced earlier HD1863 adjustment also on Bessel ellipsoid. Both HD1863 and HD1909 were originally on Ferro Prime Meridian but subsequently converted to Greenwich. Replaced by HD72 (datum code 6237).
Hungarian Datum 1972
Datum::fromSRID(Datum::EPSG_HUNGARIAN_DATUM_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6237')
Fundamental point: Szolohegy. Latitude: 47°17’32,6156”N, longitude 19°36’09.9865”E (of Greenwich); geoid height 6.56m.
Replaced Hungarian Datum 1909 (EPSG datum code 1024).
IG05 Intermediate Datum
Datum::fromSRID(Datum::EPSG_IG05_INTERMEDIATE_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1142')
Defined by transformation from IGD05 at epoch 2004.75.
IG05/12 Intermediate Datum
Datum::fromSRID(Datum::EPSG_IG05_12_INTERMEDIATE_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1144')
Defined by transformation from IGD05/12 at epoch 2012.00.
IGC 1962 Arc of the 6th Parallel South
Datum::fromSRID(Datum::EPSG_IGC_1962_ARC_OF_THE_6TH_PARALLEL_SOUTH)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6697')
Coordinates of 3 stations determined with respect to Arc 1950: Mulungu 4°47’39.2325”S, 29°59’37.5864”E; Nyakawembe 4°14’57.3618”S, 29°42’52.8032”E; Kavula 4°35’15.8634”S, 29°41’14.2693”E (all longitude w.r.t. Greenwich).
IGN 1962 Kerguelen
Datum::fromSRID(Datum::EPSG_IGN_1962_KERGUELEN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6698')
K0 1949.
IGN 1966
Datum::fromSRID(Datum::EPSG_IGN_1966)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5196')
Fundamental benchmark: RN501
Included as part of NGPF - see datum code 5195.
IGN 1988 LS
Datum::fromSRID(Datum::EPSG_IGN_1988_LS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5210')
Mean sea level 1984 at Terre de Haut. Origin = marker O de -5 with defined height of 1.441m above msl. IGN 1988 LS height 0.00m is 0.46m above 1987 sounding datum; this approximately corresponds with msl at Pointe-à-Pitre (see datum code 5155, CRS 5757).
Orthometric heights.
IGN 1988 MG
Datum::fromSRID(Datum::EPSG_IGN_1988_MG)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5211')
Mean sea level 1987 at Grand-Bourg. Origin = marker M0-I with defined height of 0.832m above msl. IGN 1988 MG height 0.00m is 0.46m above 1987 sounding datum; this approximately corresponds with msl at Pointe-à-Pitre (see datum code 5155, CRS code 5757).
Orthometric heights.
IGN 1988 SB
Datum::fromSRID(Datum::EPSG_IGN_1988_SB)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5213')
Mean sea level 1988 at port of Gustavia. Origin = marker A.ef-2 with defined height of 0.621m above msl. IGN 1988 SB height 0.00m deduced to be 0.201m above mean sea level at Pointe-à-Pitre.
Orthometric heights.
IGN 1988 SM
Datum::fromSRID(Datum::EPSG_IGN_1988_SM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5214')
Mean sea level 1949-1950 deduced at Fort Marigot. Origin = marker AS-13 with defined height of 6.990m above msl. IGN 1988 SM height 0.00m deduced to be 0.41m above sounding datum.
Orthometric heights.
IGN 1992 LD
Datum::fromSRID(Datum::EPSG_IGN_1992_LD)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5212')
Mean sea level at Pointe-à-Pitre. Origin = marker A with defined height of 0.792m above msl. IGN 1992 LD height 0.00m is 0.629m above sounding datum at Pointe-à-Pitre.
Orthometric heights. Replaced by IGN 2008 LD (datum code 1250).
IGN 2008 LD
Datum::fromSRID(Datum::EPSG_IGN_2008_LD)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1250')
Mean sea level at Pointe-à-Pitre. Origin = IGN Marker 20A with defined height of 0.50 m above msl of 1987.
Orthometric heights. Replaces IGN 1992 LD (datum code 5212).
IGN Astro 1960
Datum::fromSRID(Datum::EPSG_IGN_ASTRO_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6700')
Realised through a set of independent astronomically-positioned points.
Observed during 1959-1960. Independent points not connected through a network. Relative accuracy estimated at 50-100m. Replaced by Mauritania 1999 (datum code 6702).
IGN53 Mare
Datum::fromSRID(Datum::EPSG_IGN53_MARE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6641')
South-east end of the La Roche base.
IGN56 Lifou
Datum::fromSRID(Datum::EPSG_IGN56_LIFOU)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6633')
South end of the Goume base.
IGN63 Hiva Oa
Datum::fromSRID(Datum::EPSG_IGN63_HIVA_OA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6689')
Fundamental point: Atuona. Latitude: 9°48’27.20”S, longitude: 139°02’15.45”W (of Greenwich).
Replaced by RGPF (datum code 6687).
IGN72 Grande Terre
Datum::fromSRID(Datum::EPSG_IGN72_GRANDE_TERRE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6634')
North end of Gomen base.
IGN72 Nuku Hiva
Datum::fromSRID(Datum::EPSG_IGN72_NUKU_HIVA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6630')
Fundamental point: Taiohae. Latitude: 8°55’03.97”S, longitude: 140°05’36.24”W (of Greenwich).
Replaced by RGPF (datum code 6687).
IGS00
Datum::fromSRID(Datum::EPSG_IGS00)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1245')
Derived from ITRF2000 at epoch 1998.00 through a subset of 54 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1143 through GPS week 1252 (2001-12-02 through 2004-01-10). Replaces IGS97, replaced by IGb00. For all practical purposes coincident with ITRF2000.
IGS05
Datum::fromSRID(Datum::EPSG_IGS05)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1247')
Derived from ITRF2005 at epoch 2000.00 through a subset of 139 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1400 through GPS week 1631 (2006-11-05 to 2011-04-16). Replaces IGb00, replaced by IGb08. For all practical purposes coincident with ITRF2005.
IGS08
Datum::fromSRID(Datum::EPSG_IGS08)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1141')
Derived from ITRF2008 at epoch 2005.00 through a subset of 232 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1632 through GPS week 1708 (2011-04-17 through 2012-10-06). Replaces IGS05. Replaced by IGb08. For all practical purposes coincident with ITRF2008.
IGS14
Datum::fromSRID(Datum::EPSG_IGS14)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1191')
Derived from ITRF2014 at epoch 2010.00 through a subset of 252 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1934 (2017-01-29) through GPS week 2105 (2020-05-16). Replaces IGb08, replaced by IGb14. For all practical purposes coincident with ITRF2014.
IGS20
Datum::fromSRID(Datum::EPSG_IGS20)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1333')
A subset of 332 stable, well-performing IGS stations from ITRF2020.
Used for IGS products from GPS week 2238 (2022-11-27). Replaces IGb14. Compared to IGb14, IGS20 contains 98 new stations, mostly in previously sparsely covered areas, but with 25 IGb14 sites removed. For all practical purposes coincident with ITRF2020.
IGS97
Datum::fromSRID(Datum::EPSG_IGS97)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1244')
Derived from ITRF97 at epoch 1997.00 through a subset of stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1065 through GPS week 1142 (2000-06-04 to 2001-12-01). Replaced by IGS00. For all practical purposes coincident with ITRF97.
IGb00
Datum::fromSRID(Datum::EPSG_IGB00)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1246')
Derived from ITRF2000 at epoch 1998.00 through a subset of 99 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1253 through GPS week 1399 (2004-01-11 to 2006-11-04). Replaces IGS00, replaced by IGS05. For all practical purposes coincident with ITRF2000.
IGb08
Datum::fromSRID(Datum::EPSG_IGB08)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1248')
Derived from ITRF2008 at epoch 2005.00 through a subset of 232 stable IGS station coordinates. Preserves the ITRF origin, orientation and scale, but without any distortions introduced from non-GNSS space-geodetic techniques.
Used for IGS products from GPS week 1709 through GPS week 1933 (2012-10-07 to 2017-01-28). Replaces IGS08, replaced by IGS14. For all practical purposes coincident with ITRF2008.
IGb14
Datum::fromSRID(Datum::EPSG_IGB14)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1272')
Daily IGS combined operational solutions of GPS weeks 730 to 2092. IGb14 is aligned in origin, scale and orientation to IGS14 via a subset of 233 selected stations. As IGS14 is aligned to ITRF2014, IGb14 is also aligned to ITRF2014.
Used for IGS products from GPS week 2106 (2020-05-17). Replaces IGS14. Compared to IGS14, IGb14 benefits from 5 more years of input data, a revised discontinuity list and 9 additional stations. For all practical purposes coincident with ITRF2014.
IRENET95
Datum::fromSRID(Datum::EPSG_IRENET95)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6173')
ETRS89 stations in Ireland
Densification of ETRS89
Ibiza
Datum::fromSRID(Datum::EPSG_IBIZA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1277')
Mean Sea Level at Ibiza harbour between January 2003 and December 2005.
Orthometric heights.
Incheon
Datum::fromSRID(Datum::EPSG_INCHEON)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1049')
MSL 1913-1916 at Incheon Bay.
Indian 1954
Datum::fromSRID(Datum::EPSG_INDIAN_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6239')
Extension of Kalianpur 1937 over Myanmar and Thailand.
Indian 1960
Datum::fromSRID(Datum::EPSG_INDIAN_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6131')
DMA extension over IndoChina of the Indian 1954 network adjusted to better fit local geoid.
Also known as Indian (DMA Reduced).
Indian 1975
Datum::fromSRID(Datum::EPSG_INDIAN_1975)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6240')
Fundamental point: Khau Sakaerang.
Indian Spring Low Water
Datum::fromSRID(Datum::EPSG_INDIAN_SPRING_LOW_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1085')
Not specific to any location or epoch.
The level below MSL equal to the sum of the amplitudes of the harmonic constituents M2, S2, K1 and O1. It approximates mean lower low water spring tides (MLLWS).
Indonesian Datum 1974
Datum::fromSRID(Datum::EPSG_INDONESIAN_DATUM_1974)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6238')
Fundamental point: Padang. Latitude: 0°56’38.414”S, longitude: 100°22’ 8.804”E (of Greenwich). Ellipsoidal height 3.190m, gravity-related height 14.0m above mean sea level.
Replaced by DGN95.
Indonesian Geoid 2020 version 1
Datum::fromSRID(Datum::EPSG_INDONESIAN_GEOID_2020_VERSION_1)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1294')
Defined by INAGeoid2020 gravimetric geoid model v1 applied to SRGI2013.
Uses gravity data observed to 2019 fitted to control points on Java and Bali.
Indonesian Geoid 2020 version 2
Datum::fromSRID(Datum::EPSG_INDONESIAN_GEOID_2020_VERSION_2)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1328')
Defined by INAGeoid2020 gravimetric geoid model v2 applied to SRGI2013.
Uses gravity data observed to 2021 fitted to tide gauge benchmarks across Indonesia.
Instantaneous Water Level
Datum::fromSRID(Datum::EPSG_INSTANTANEOUS_WATER_LEVEL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5113')
Instantaneous water level uncorrected for tide.
Not specific to any location or epoch.
Institut Geographique du Congo Belge 1955
Datum::fromSRID(Datum::EPSG_INSTITUT_GEOGRAPHIQUE_DU_CONGO_BELGE_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6701')
Fundamental point: Yella east base. Latitude: 6°00’53.139”S, longitude: 12°58’29.287”E (of Greenwich).
Replaced by IGC 1962 Arc of the 6th Parallel South, except for oil industry activities.
International Great Lakes Datum 1955
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_GREAT_LAKES_DATUM_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5204')
Mean water level 1941-1956 at Pointe-au-Père (Father’s Point), Quebec. Benchmark 1248-G = 3.794m.
Dynamic heights. Adopted in 1962. Replaced by IGLD 1985 in January 1992.
International Great Lakes Datum 1985
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_GREAT_LAKES_DATUM_1985)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5205')
Mean water level 1970-1983 at Pointe-au-Père (Father’s Point) and 1984-1988 at Rimouski, Quebec. Benchmark 1250-G = 6.273m.
Dynamic heights. Replaces IGLD 1955 from January 1992.
International Terrestrial Reference Frame 1988
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1988)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6647')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS).
Realization of the IERS Terrestrial Reference System (ITRS) at epoch 1988.0. Replaced by ITRF89 (code 6648).
International Terrestrial Reference Frame 1989
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1989)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6648')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1988.0.
Realization of the IERS Terrestrial Reference System (ITRS) from April 1991. Replaces ITRF88 (code 6647). Replaced by ITRF90 (code 6649).
International Terrestrial Reference Frame 1990
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1990)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6649')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1988.0.
Realization of the IERS Terrestrial Reference System (ITRS) from December 1991. Replaces ITRF89 (code 6648). Replaced by ITRF91 (code 6650).
International Terrestrial Reference Frame 1991
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1991)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6650')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1988.0.
Realization of the IERS Terrestrial Reference System (ITRS) from October 1992. Replaces ITRF90 (code 6649). Replaced by ITRF92 (code 6651).
International Terrestrial Reference Frame 1992
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6651')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 287 3-dimensional Cartesian station coordinates (SCS) for epoch 1988.0.
Realization of the IERS Terrestrial Reference System (ITRS) from October 1993. Replaces ITRF91 (code 6650). Replaced by ITRF93 (code 6652).
International Terrestrial Reference Frame 1993
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6652')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1993.0.
Realization of the IERS Terrestrial Reference System (ITRS) from October 1994. Replaces ITRF92 (code 6651). Replaced by ITRF94 (code 6653).
International Terrestrial Reference Frame 1994
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1994)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6653')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1993.0.
Realization of the IERS Terrestrial Reference System (ITRS) from March 1996. Replaces ITRF93 (code 6652). Replaced by ITRF96 (code 6654).
International Terrestrial Reference Frame 1996
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6654')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1997.0.
Realization of the IERS Terrestrial Reference System (ITRS) from May 1998. Replaces ITRF94 (code 6653). Replaced by ITRF97 (code 6655).
International Terrestrial Reference Frame 1997
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6655')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1997.0.
Realization of the IERS Terrestrial Reference System (ITRS) from May 1999. Replaces ITRF96 (code 6654). Replaced by ITRF2000 (code 6656).
International Terrestrial Reference Frame 2000
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6656')
Origin at geocentre, orientated to the BIH Terrestrial System at epoch 1984.0. Datum defined by a set of 3-dimensional Cartesian station coordinates (SCS) for epoch 1997.0.
Realization of the IERS Terrestrial Reference System (ITRS) from 2004. Replaces ITRF97 (code 6655). Replaced by ITRF2005 (code 6896).
International Terrestrial Reference Frame 2005
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6896')
Origin at geocentre, originally orientated to the BIH Terrestrial System at epoch 1984.0 then adjusted to ensure zero net rotation to earth’s overall tectonic motion. Defined by time series of Cartesian station coordinates for epoch 2000.0.
Realization of the IERS Terrestrial Reference System (ITRS) from September 2007. Replaces ITRF2000 (code 6656). Replaced by ITRF2008 (datum code 1061).
International Terrestrial Reference Frame 2008
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1061')
Origin at geocentre. The ITRF2008 origin is defined in such a way that there are null translation parameters at epoch 2005.0 and null translation rates between the ITRF2008 and the ILRS SLR time series.
Realization of the IERS Terrestrial Reference System (ITRS) from 2012. Replaces ITRF2005 (code 6896).
International Terrestrial Reference Frame 2014
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_2014)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1165')
Origin at geocentre. Origin = ILRS SLR long-term solution at epoch 2010.0. Zero scale and scale rate between ITRF2014 and the average of VLBI and SLR scales/rates. Orientation = ITRF2008@ 2010.0 with zero rotation rates between the ITRF2014 and ITRF2008.
Realization of the IERS Terrestrial Reference System (ITRS). Replaces ITRF2008 (datum code 1061) from January 2016. Replaced by ITRF2020 (datum code 1322) from April 2022.
International Terrestrial Reference Frame 2020
Datum::fromSRID(Datum::EPSG_INTERNATIONAL_TERRESTRIAL_REFERENCE_FRAME_2020)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1322')
Origin at geocentre. Origin = ILRS SLR long-term solution at epoch 2015.0. Zero scale and scale rate between ITRF2020 and the average of VLBI and SLR scales/rates. Orientation = ITRF2014@ 2015.0 with zero rotation rates between the ITRF2020 and ITRF2014.
Realization of the IERS Terrestrial Reference System (ITRS). Replaces ITRF2014 (datum code 1165) from April 2022.
Iraq-Kuwait Boundary Datum 1992
Datum::fromSRID(Datum::EPSG_IRAQ_KUWAIT_BOUNDARY_DATUM_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6667')
Four stations established between September and December 1991 determined by GPS and Doppler observations.
Iraqi Geospatial Reference System
Datum::fromSRID(Datum::EPSG_IRAQI_GEOSPATIAL_REFERENCE_SYSTEM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1029')
ITRF2000 at epoch 1997.0
Islands Net 1993
Datum::fromSRID(Datum::EPSG_ISLANDS_NET_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6659')
ITRF93 at epoch 1993.6.
Replaced by ISN2004 (datum code 1060).
Islands Net 2004
Datum::fromSRID(Datum::EPSG_ISLANDS_NET_2004)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1060')
ITRF2000 at epoch 2004.6.
Replaces ISN93 (datum code 6659). Replaced by ISN2016 (datum code 1087).
Islands Net 2016
Datum::fromSRID(Datum::EPSG_ISLANDS_NET_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1187')
ITRF2014 at epoch 2016.5.
Replaces ISN2004 from September 2017.
Israel 1993
Datum::fromSRID(Datum::EPSG_ISRAEL_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6141')
Fundamental point: Latitude: 31°44’03.817”N, longitude: 35°12’16.261”E (of Greenwich).
Replaces Palestine 1923 (datum code 6281). Replaced by IGD05 (datum code 1143).
Israeli Geodetic Datum 2005
Datum::fromSRID(Datum::EPSG_ISRAELI_GEODETIC_DATUM_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1114')
Defined by coordinates of 13 Active Positioning Network (APN) stations in ITRF2000 at epoch 2004.75. A further five APN stations were added in 2006.
Replaces Israel 1993 (datum code 6141). Replaced by IGD05/12 (datum code 1115).
Israeli Geodetic Datum 2005(2012)
Datum::fromSRID(Datum::EPSG_ISRAELI_GEODETIC_DATUM_2005_2012)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1115')
Datum updated in 2012 with four APN stations removed from definition. Coordinate epoch remains ITRF2000 at epoch 2004.75.
Replaces IGD05 (datum code 1114).
Istituto Geografico Militaire 1995
Datum::fromSRID(Datum::EPSG_ISTITUTO_GEOGRAFICO_MILITAIRE_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6670')
Densification of ETRF89 in Italy. Network of 1296 points observed 1992-1995 adjusted in 1996 constrained to 9 ETRF89 points at epoch 1989.0. By April 2021 the framework was composed of 3104 points of the fundamental network and 3819 densification points.
Replaced by RDN2008 (datum code 1132) from 2011-11-10.
Iwo Jima 1945
Datum::fromSRID(Datum::EPSG_IWO_JIMA_1945)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6709')
Fundamental point: Beacon “E”.
Jamaica 1875
Datum::fromSRID(Datum::EPSG_JAMAICA_1875)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6241')
Fundamental point: Fort Charles Flagstaff. Latitude: 17°55’55.800”N, longitude: 76°56’37.260”W (of Greenwich).
Jamaica 1969
Datum::fromSRID(Datum::EPSG_JAMAICA_1969)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6242')
Fundamental point: Fort Charles Flagstaff. Latitude: 17°55’55.800”N, longitude: 76°56’37.260”W (of Greenwich).
Jamaica 2001
Datum::fromSRID(Datum::EPSG_JAMAICA_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6758')
Aligned to WGS 84.
Jamestown 1971
Datum::fromSRID(Datum::EPSG_JAMESTOWN_1971)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1175')
MSL at Jamestown 1971 defined through elevation of triangulation station Astro DOS 71/4 Ladder Hill Fort being 267.858 metres above MSL.
Japanese Geodetic Datum 2000
Datum::fromSRID(Datum::EPSG_JAPANESE_GEODETIC_DATUM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6612')
ITRF94 at epoch 1997.0. Fundamental point: Tokyo-Taisho, latitude: 35°39’29.1572”N, longitude: 139°44’28.8759”E (of Greenwich).
Instigated under amendment to the Japanese Surveying Law with effect from April 2002. Replaces Tokyo datum (code 6301). Replaced by JGD2011 (datum code 1128) with effect from 21st October 2011.
Japanese Geodetic Datum 2000 (vertical)
Datum::fromSRID(Datum::EPSG_JAPANESE_GEODETIC_DATUM_2000_VERTICAL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1130')
24.4140 metres above mean sea level Tokyo Bay.
Orthometric heights. Replaces JSLD69 and JSLD72 with effect from April 2002. Replaced by JGD2011 (vertical) (datum code 1131) with effect from 21st October 2011.
Japanese Geodetic Datum 2011
Datum::fromSRID(Datum::EPSG_JAPANESE_GEODETIC_DATUM_2011)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1128')
ITRF94 at epoch 1997.0 except for northern Honshu area impacted by 2011 Tohoku earthquake which is ITRF2008 at epoch 2011.395. Fundamental point: Tokyo-Taisho, latitude: 35°39’29.1572”N, longitude: 139°44’28.8869”E (of Greenwich).
Instigated under amendment to the Japanese Surveying Law with effect from 21st October 2011. Replaces JGD2000 (datum code 6612).
Japanese Geodetic Datum 2011 (vertical)
Datum::fromSRID(Datum::EPSG_JAPANESE_GEODETIC_DATUM_2011_VERTICAL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1131')
24.3900 metres above mean sea level Tokyo Bay.
Orthometric heights. Replaces JGD2000 (vertical) (datum code 1130) with effect from 21st October 2011.
Japanese Standard Levelling Datum 1969
Datum::fromSRID(Datum::EPSG_JAPANESE_STANDARD_LEVELLING_DATUM_1969)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5122')
24.4140 metres above mean sea level Tokyo Bay.
Normal-orthometric heights. Replaces JSLD49. Replaced by JGD2000 (vertical) (datum code 1130) from April 2002.
Japanese Standard Levelling Datum 1972
Datum::fromSRID(Datum::EPSG_JAPANESE_STANDARD_LEVELLING_DATUM_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1129')
Mean sea level Oshoro 1963-72.
Normal-orthometric heights. Replaced by JGD2000 (vertical) (datum code 1130) with effect from April 2002.
Johnston Island 1961
Datum::fromSRID(Datum::EPSG_JOHNSTON_ISLAND_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6725')
Jouik 1961
Datum::fromSRID(Datum::EPSG_JOUIK_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6679')
Replaced by Mauritania 1999 (datum code 6702).
KOC Construction Datum
Datum::fromSRID(Datum::EPSG_KOC_CONSTRUCTION_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5188')
Approximately 1.52m below MSL. Created for the construction of the Mina al Ahmadi refinery.
KOC Well Datum
Datum::fromSRID(Datum::EPSG_KOC_WELL_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5187')
Approximately 3.22m above MSL.
Kalianpur 1880
Datum::fromSRID(Datum::EPSG_KALIANPUR_1880)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6243')
Fundamental point: Kalianpur. Latitude: 24°07’11.260”N, longitude: 77°39’17.570”E (of Greenwich).
Includes 1916 extension into Burma (Myanmar). Replaced by 1937 adjustment.
Kalianpur 1937
Datum::fromSRID(Datum::EPSG_KALIANPUR_1937)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6144')
Fundamental point: Kalianpur. Latitude: 24° 07’11.260”N, longitude: 77°39’17.570”E (of Greenwich).
Replaces 1880 adjustment except for topographic mapping. Replaced in Bangladesh and Pakistan by 1962 metrication conversion and in India by 1975 metrication conversion.
Kalianpur 1962
Datum::fromSRID(Datum::EPSG_KALIANPUR_1962)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6145')
Fundamental point: Kalianpur. Latitude: 24° 07’11.260”N, longitude: 77°39’17.570”E (of Greenwich).
1937 adjustment rescaled by ratio metric conversions of Indian foot (1937) to Indian foot (1962).
Kalianpur 1975
Datum::fromSRID(Datum::EPSG_KALIANPUR_1975)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6146')
Fundamental point: Kalianpur. Latitude: 24° 07’11.260”N, longitude: 77°39’17.570”E (of Greenwich).
1937 adjustment rescaled by ratio metric conversions of Indian foot (1937) to Indian foot (1975).
Kandawala
Datum::fromSRID(Datum::EPSG_KANDAWALA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6244')
Fundamental point: Kandawala. Latitude: 7°14’06.838”N, longitude: 79°52’36.670”E.
Karbala 1979
Datum::fromSRID(Datum::EPSG_KARBALA_1979)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6743')
Fundamental point: Karbala. Latitude: 32°34’14.4941”N, longitude: 44°00’49.6379”E.
National geodetic network established by Polservice consortium.
Kartastokoordinaattijarjestelma (1966)
Datum::fromSRID(Datum::EPSG_KARTASTOKOORDINAATTIJARJESTELMA_1966)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6123')
Adjustment with fundamental point SF31 based on ED50 transformed to best fit the older VVJ adjustment.
Adopted in 1970.
Kasai 1953
Datum::fromSRID(Datum::EPSG_KASAI_1953)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6696')
Two stations of the Katanga triangulation with ellipsoid change applied: Kabila, latitude 6°58’34.023”S, longitude 23°50’24.028”E (of Greenwich); and Gandajika NW base, latitude 6°45’01.057”S, longitude 23°57’03.038”E (of Greenwich).
Replaced by IGC 1962 Arc of the 6th Parallel South.
Katanga 1955
Datum::fromSRID(Datum::EPSG_KATANGA_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6695')
Fundamental point: Tshinsenda A. Latitude: 12°30’31.568”S, longitude: 28°01’02.971”E (of Greenwich).
Replaces earlier adjustments.
Kertau (RSO)
Datum::fromSRID(Datum::EPSG_KERTAU_RSO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6751')
Adopts metric conversion of 0.914398 metres per yard exactly. This is a truncation of the Sears 1922 ratio.
Kertau 1968
Datum::fromSRID(Datum::EPSG_KERTAU_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6245')
Fundamental point: Kertau. Latitude: 3°27’50.710”N, longitude: 102°37’24.550”E (of Greenwich).
Replaces MRT48 and earlier adjustments. Adopts metric conversion of 39.370113 inches per metre. Not used for 1969 metrication of RSO grid - see Kertau (RSO) (code 6751).
Kingdom of Saudi Arabia Geodetic Reference Frame 2017
Datum::fromSRID(Datum::EPSG_KINGDOM_OF_SAUDI_ARABIA_GEODETIC_REFERENCE_FRAME_2017)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1268')
ITRF2014 at epoch 2017.00.
Realized by 333 GNSS stations in Saudi Arabia aligned to ITRF2014 through core network of 46 stations adjusted to 15 IGS stations.
Kingdom of Saudi Arabia Vertical Reference Frame Jeddah 2014
Datum::fromSRID(Datum::EPSG_KINGDOM_OF_SAUDI_ARABIA_VERTICAL_REFERENCE_FRAME_JEDDAH_2014)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1269')
Jeddah tide gauge bench mark TGBM-B height of 1.7446m at 2014.75.
Kiunga
Datum::fromSRID(Datum::EPSG_KIUNGA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1151')
PSM 9465 at Kiunga Airport. Propagated through bilinear interpolation of EGM2008 geoid model (transformation code 3858) reduced to PSM 9465 by offset of -3.0m.
Korean Datum 1985
Datum::fromSRID(Datum::EPSG_KOREAN_DATUM_1985)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6162')
Fundamental point: Suwon. Latitude 37°16’31.9034”N, longitude 127°03’05.1451”E of Greenwich. This is consistent with the Tokyo 1918 datum latitude and longitude.
Replaces Tokyo 1918 (datum code 6301). Replaced by Korea 2000 (datum code 6737).
Korean Datum 1995
Datum::fromSRID(Datum::EPSG_KOREAN_DATUM_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6166')
Kosovo Reference System 2001
Datum::fromSRID(Datum::EPSG_KOSOVO_REFERENCE_SYSTEM_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1251')
Densification of ETRF97 in Kosovo at epoch 2001.25.
First order network of 32 stations connected to 8 EUREF Permanant Network (EPN) stations observed march-April 2001. Densified in 2012.
Kousseri
Datum::fromSRID(Datum::EPSG_KOUSSERI)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6198')
IGN astronomical station Dabanga; 11°55’05.9”N 14°38’40.8”E (of Greenwich).
Kumul 34
Datum::fromSRID(Datum::EPSG_KUMUL_34)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1150')
Kumul Platform Station 34. Propagated through bilinear interpolation of EGM96 geoid model (transformation code 10084) reduced to Kumul 34 by offset of -0.87m.
Kusaie 1951
Datum::fromSRID(Datum::EPSG_KUSAIE_1951)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6735')
Kuwait Oil Company
Datum::fromSRID(Datum::EPSG_KUWAIT_OIL_COMPANY)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6246')
Fundamental point: K28. Latitude: 29°03’42.348”N, longitude: 48°08’42.558”E (of Greenwich).
Kuwait PWD
Datum::fromSRID(Datum::EPSG_KUWAIT_PWD)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5186')
Mean Low Low Water (MLLW) at Kuwait City.
Approximately 1.03m below MSL.
Kuwait Utility
Datum::fromSRID(Datum::EPSG_KUWAIT_UTILITY)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6319')
Kyrgyzstan Geodetic Datum 2006
Datum::fromSRID(Datum::EPSG_KYRGYZSTAN_GEODETIC_DATUM_2006)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1160')
6 stations of the Kyrgyzstan zero-order network tied to ITRF2005 at epoch 2006.70.
The accuracy in the connection to ITRF2005 is estimated to be 5 mm in horizontal and 10-20 mm in height (95% confidence).
La Canoa
Datum::fromSRID(Datum::EPSG_LA_CANOA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6247')
Fundamental point: La Canoa. Latitude: 8°34’17.170”N, longitude: 63°51’34.880”W (of Greenwich).
Origin and network incorporated within PSAD56 (datum code 6248).
La Gomera
Datum::fromSRID(Datum::EPSG_LA_GOMERA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1282')
Mean Sea Level at San Sebastian de la Gomera harbour.
Orthometric heights.
La Palma
Datum::fromSRID(Datum::EPSG_LA_PALMA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1283')
Mean Sea Level at Santa Cruz de la Palma harbour in 1997.
Orthometric heights.
Lagos 1955
Datum::fromSRID(Datum::EPSG_LAGOS_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5194')
Mean sea level at Lagos, 1912-1928.
Lake
Datum::fromSRID(Datum::EPSG_LAKE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6249')
Fundamental point: Maracaibo Cathedral. Latitude: 10°38’34.678”N, longitude: 71°36’20.224”W (of Greenwich).
Landeshohennetz 1995
Datum::fromSRID(Datum::EPSG_LANDESHOHENNETZ_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5128')
Origin at Repere Pierre du Niton (RPN) defined as 373.6 metres above msl. This value derived from msl at Marseille in 1897 through the French Lallemand network.
Orthometric heights. For scientific purposes only, replaces LN02.
Landesnivellement 1902
Datum::fromSRID(Datum::EPSG_LANDESNIVELLEMENT_1902)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5127')
Origin at Repere Pierre du Niton (RPN) defined as 373.6 metres above msl. This value derived from msl at Marseille in 1897 through the French Lallemand network.
Levelling observations not corrected for gravity field. For scientific purposes, replaced by LHHN95.
Landshaedarkerfi Islands 2004
Datum::fromSRID(Datum::EPSG_LANDSHAEDARKERFI_ISLANDS_2004)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1190')
Adjustment is referenced to mean sea level at Reykjavík epoch 2004.6.
Lanzarote
Datum::fromSRID(Datum::EPSG_LANZAROTE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1278')
Mean Sea Level at Naos harbour, Arrecife, between 1994 and 1995.
Orthometric heights.
Lao 1993
Datum::fromSRID(Datum::EPSG_LAO_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6677')
Fundamental point: Lao 1982 coordinates of Pakxa pillar. Latitude: 18°23’57.0056”N, longitude: 103°38’41.8020”E (of Greenwich). Orientation parallel with WGS 84.
Replaces Vientiane 1982. Replaced by Lao 1997
Lao National Datum 1997
Datum::fromSRID(Datum::EPSG_LAO_NATIONAL_DATUM_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6678')
Fundamental point: Vientiane (Nongteng) Astro Pillar. Latitude: 18°01’31.3480”N, longitude: 102°30’57.1376”E (of Greenwich).
Replaces Lao 1993.
Latvia 1992
Datum::fromSRID(Datum::EPSG_LATVIA_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6661')
Constrained to 4 ETRS89 points in Latvia from the EUREF Baltic 1992 campaign.
Densification of ETRS89 during the 1992 Baltic campaign.
Latvian Height System 2000
Datum::fromSRID(Datum::EPSG_LATVIAN_HEIGHT_SYSTEM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1162')
Latvian realisation of EVRF2007. Observed from 2000-2010 and reduced to epoch 2000.5 using empirical land uplift model of Latvia. EVRF2007 heights of 16 points around Latvia held fixed.
Uses Normal heights.
Le Pouce 1934
Datum::fromSRID(Datum::EPSG_LE_POUCE_1934)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6699')
Fundamental point: Le Pouce. Latitude: 20°11’42.25”S, longitude: 57°31’18.58”E (of Greenwich).
Leigon
Datum::fromSRID(Datum::EPSG_LEIGON)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6250')
Fundamental point: GCS Station 121, Leigon. Latitude: 5°38’52.27”N, longitude: 0°11’46.08”W (of Greenwich).
Replaced Accra datum (code 6168) from 1978. Coordinates at Leigon fundamental point defined as Accra datum values for that point.
Lerwick
Datum::fromSRID(Datum::EPSG_LERWICK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5140')
Mean Sea Level at Lerwick 1979 correlated to pre-1900. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights.
Liberia 1964
Datum::fromSRID(Datum::EPSG_LIBERIA_1964)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6251')
Fundamental point: Robertsfield. Latitude: 6°13’53.02”N, longitude: 10°21’35.44”W (of Greenwich).
Libyan Geodetic Datum 2006
Datum::fromSRID(Datum::EPSG_LIBYAN_GEODETIC_DATUM_2006)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6754')
5 stations tied to ITRF2000 through 8 days of continuous observations in May 2006.
Replaces ELD79.
Lisbon 1890
Datum::fromSRID(Datum::EPSG_LISBON_1890)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6666')
Fundamental point: Castelo Sao Jorge, Lisbon. Latitude: 38°42’43.631”N, longitude: 9°07’54.862”W of Greenwich.
Replaced by Lisbon 1937 adjustment (which uses International 1924 ellipsoid).
Lisbon 1890 (Lisbon)
Datum::fromSRID(Datum::EPSG_LISBON_1890_LISBON)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6904')
Fundamental point: Castelo Sao Jorge, Lisbon. Latitude: 38°42’43.631”N, longitude: 0°E (of Lisbon).
Replaced by Lisbon 1937 adjustment (which uses International 1924 ellipsoid).
Lisbon 1937
Datum::fromSRID(Datum::EPSG_LISBON_1937)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6207')
Fundamental point: Castelo Sao Jorge, Lisbon. Latitude: 38°42’43.631”N, longitude: 9°07’54.862”W (of Greenwich).
Replaces Lisbon 1890 adjustment (which used Bessel 1841 ellipsoid).
Lisbon 1937 (Lisbon)
Datum::fromSRID(Datum::EPSG_LISBON_1937_LISBON)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6803')
Fundamental point: Castelo Sao Jorge, Lisbon. Latitude: 38°42’43.631”N, longitude: 0°E (of Lisbon).
Replaces Lisbon 1890 adjustment (which used Bessel 1841 ellipsoid).
Lithuania 1994 (ETRS89)
Datum::fromSRID(Datum::EPSG_LITHUANIA_1994_ETRS89)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6126')
Constrained to 4 ETRS89 points in Lithuania from the EUREF Baltic 1992 campaign.
Densification of ETRS89 during the 1992 Baltic campaign.
Lithuanian Height System 2007
Datum::fromSRID(Datum::EPSG_LITHUANIAN_HEIGHT_SYSTEM_2007)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1299')
Lithuanian realisation of EVRF2007. EVRF2007 heights of 10 points in Lithuania held fixed.
Uses Normal heights.
Little Cayman Vertical Datum 1961
Datum::fromSRID(Datum::EPSG_LITTLE_CAYMAN_VERTICAL_DATUM_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1098')
Local Tidal Datum at Pago Pago 2020
Datum::fromSRID(Datum::EPSG_LOCAL_TIDAL_DATUM_AT_PAGO_PAGO_2020)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1302')
MSL at Pago Pago 2011–2016.
Normal-orthometric heights. Replaces ASVD02 (datum code 1125) in March 2020 after the ASVD02 benchmarks were destroyed by earthquake activity.
Locodjo 1965
Datum::fromSRID(Datum::EPSG_LOCODJO_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6142')
Fundamental point: T5 Banco. Latitude: 5°18’50.5”N, longitude: 4°02’05.1”W (of Greenwich).
Loma Quintana
Datum::fromSRID(Datum::EPSG_LOMA_QUINTANA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6288')
Fundamental point: Loma Quintana.
Replaced by La Canoa (code 6247).
Lome
Datum::fromSRID(Datum::EPSG_LOME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6252')
Low Water
Datum::fromSRID(Datum::EPSG_LOW_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1093')
Not specific to any location or epoch.
The lowest level reached by the water surface in one tidal cycle. When used in inland (non-tidal) waters it is generally defined as a level which the daily mean water level would fall below less than 5% of the time. On a river it is a sloping surface.
Lower Low Water Large Tide
Datum::fromSRID(Datum::EPSG_LOWER_LOW_WATER_LARGE_TIDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1083')
Not specific to any location or epoch.
The average of the lowest low waters, one from each of 19 years of observations.
Lowest Astronomical Tide
Datum::fromSRID(Datum::EPSG_LOWEST_ASTRONOMICAL_TIDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1080')
Not specific to any location or epoch.
The lowest tide level which can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions.
Lowest Astronomical Tide Netherlands
Datum::fromSRID(Datum::EPSG_LOWEST_ASTRONOMICAL_TIDE_NETHERLANDS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1290')
Surface defined through the nllat hydroid model applied to ETRS89.
The lowest tide level which can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions.
Luxembourg Reference Frame
Datum::fromSRID(Datum::EPSG_LUXEMBOURG_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6181')
Fundamental point of 1930 triangulation: northern station of Habay-la-Neuve baseline in Belgium. Latitude: 49°43’24.408”N, longitude: 5°38’22.470”E (of Greenwich). Since 2006 LUREF has been realized by GNSS station positions and transformation from ETRF.
The transformation from ETRF 2000 first defining LUREF in 2006 has been recomputed in 2014 and 2020.
Luzon 1911
Datum::fromSRID(Datum::EPSG_LUZON_1911)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6253')
Fundamental point: Balacan. Latitude: 13°33’41.000”N, longitude: 121°52’03.000”E (of Greenwich).
Replaced by Philippine Reference system of 1992 (datum code 6683).
Lyon Turin Ferroviaire 2004
Datum::fromSRID(Datum::EPSG_LYON_TURIN_FERROVIAIRE_2004)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1295')
Densification of ETRS89 realised through network of 40 stations adjusted to 7 EUREF reference stations in ETRF2000@2002.0.
Lyttelton 1937
Datum::fromSRID(Datum::EPSG_LYTTELTON_1937)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5161')
MSL at Lyttelton harbour over 9 years between 1918 and 1933.
M’poraloko
Datum::fromSRID(Datum::EPSG_MPORALOKO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6266')
MGI 1901
Datum::fromSRID(Datum::EPSG_MGI_1901)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1031')
Fundamental point: Hermannskogel. Latitude: 48°16’15.29”N, longitude: 16°17’55.04”E (of Greenwich).
The longitude of the datum origin equates to the Albrecht 1902 value for the Ferro meridian of 17°39’46.02” west of Greenwich. Densified in 1948.
MML07 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_MML07_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1271')
Defined through the application of the MML07 NTv2 transformation (code 9369) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2020 to support intermediate CRS “MML07-IRF” in the emulation of the MML07 Snake map projection.
MOLDOR11 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_MOLDOR11_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1315')
Defined through the application of the MOLDOR11 NTv2 transformation (code 9878) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2021 to support intermediate CRS “MOLDOR11-IRF” in the emulation of the MOLDOR11 Snake map projection.
MOLDREF99
Datum::fromSRID(Datum::EPSG_MOLDREF99)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1032')
Densification of ETRS89.
MOMRA Terrestrial Reference Frame 2000
Datum::fromSRID(Datum::EPSG_MOMRA_TERRESTRIAL_REFERENCE_FRAME_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1218')
ITRF2000 at epoch 2004.00.
13 CORS Fiducial Stations linked to 7 IGS stations by 10-day long GPS survey.
MOMRA Vertical Geodetic Control
Datum::fromSRID(Datum::EPSG_MOMRA_VERTICAL_GEODETIC_CONTROL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1219')
Mean sea level Jeddah 1969.
MOP78
Datum::fromSRID(Datum::EPSG_MOP78)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6639')
MRH21 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_MRH21_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1314')
Defined through the application of the MRH21 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2021 to support intermediate CRS “MRH21-IRF” in the emulation of the MRH21 Snake map projection.
MWC18 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_MWC18_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1324')
Defined through the application of the MWC18 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2022 to support intermediate CRS “MWC18” in the emulation of the MWC18 Snake map projection.
Macao 1920
Datum::fromSRID(Datum::EPSG_MACAO_1920)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1207')
Fundamental point: Avenida Conselheiro Borja base A, later transferred to Monte da Barra, latitude 22°11’03.139”N, longitude 113°31’43.625”E (of Greenwich).
Replaces Macao 1907. In 1955 an adjustment made in 1940 was assessed to have unresolvable conflicts and the 1920 adjustment was reinstated.
Macao Geodetic Datum 2008
Datum::fromSRID(Datum::EPSG_MACAO_GEODETIC_DATUM_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1208')
ITRF2005 at epoch 2008.38.
Locally sometimes referred to as ITRF2005, this is not strictly correct as it applies only at epoch 2008.38 and ignores subsequent tectonic plate motion.
Macao Height Datum
Datum::fromSRID(Datum::EPSG_MACAO_HEIGHT_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1210')
Mean sea level Ma Kau Seak 1925-1964.
Madrid 1870 (Madrid)
Datum::fromSRID(Datum::EPSG_MADRID_1870_MADRID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6903')
Fundamental point: Retiro observatory, Madrid.
Replaced by ED50.
Madzansua
Datum::fromSRID(Datum::EPSG_MADZANSUA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6128')
Fundamental point: Madzansua.
Replaced by transformation to Tete datum (datum code 6127).
Mahe 1971
Datum::fromSRID(Datum::EPSG_MAHE_1971)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6256')
Fundamental point: Station SITE. Latitude: 4°40’14.644”S, longitude: 55°28’44.488”E (of Greenwich).
South East Island 1943 (datum code 1138) used for topographic mapping, cadastral and hydrographic survey.
Makassar
Datum::fromSRID(Datum::EPSG_MAKASSAR)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6257')
Fundamental point: station P1, Moncongloe. Latitude: 5°08’41.42”S, long 119°24’14.94”E (of Greenwich).
Makassar (Jakarta)
Datum::fromSRID(Datum::EPSG_MAKASSAR_JAKARTA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6804')
Fundamental point: station P1, Moncongloe. Latitude 5°08’41.42”S, longitude 12°35’47.15”E (of Jakarta).
Malin Head
Datum::fromSRID(Datum::EPSG_MALIN_HEAD)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5130')
Mean sea level between January 1960 and December 1969. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights.
Mallorca
Datum::fromSRID(Datum::EPSG_MALLORCA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1275')
Mean Sea Level at Palma de Mallorca harbour between April 1997 and December 2006.
Orthometric heights.
Malongo 1987
Datum::fromSRID(Datum::EPSG_MALONGO_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6259')
Fundamental point: Station Y at Malongo base camp. Latitude: 5°23’30.810”S, longitude: 12°12’01.590”E (of Greenwich).
Replaced Mhast (offshore) (code 6705) in 1987. Origin coordinates constrained to those of Mhast (offshore) but other station coordinates differ. References to “Mhast” since 1987 often should have stated “Malongo 1987”.
Manoca 1962
Datum::fromSRID(Datum::EPSG_MANOCA_1962)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6193')
Reservoir centre at the Manoca tower (“tube Suel”), 3°51’49.896”N, 9°36’49.347”E (of Greenwich).
The intent of the Bukavu 1953 conference was to adopt the Clarke 1880 (RGS) ellipsoid (code 7012) but in practice this datum has used the IGN version. Replaces Douala 1948 (code 6192).
Maputo
Datum::fromSRID(Datum::EPSG_MAPUTO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5121')
Mean sea level at Maputo.
Marco Geocentrico Nacional de Referencia
Datum::fromSRID(Datum::EPSG_MARCO_GEOCENTRICO_NACIONAL_DE_REFERENCIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6686')
Densification of SIRGAS95 (ITRF94 at epoch 1995.4) in Colombia. Bogota observatory coordinates: Latitude: 4°35’46.3215”N, longitude: 74°04’39.0285”W (of Greenwich).
Densification of SIRGAS 1995 within Colombia. Replaces Bogota 1975 (datum code 6218).
Marco Geodesico Nacional de Bolivia
Datum::fromSRID(Datum::EPSG_MARCO_GEODESICO_NACIONAL_DE_BOLIVIA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1063')
IGS05 (ITRF2005) at epoch 2010.2. Densification of SIRGAS95 network in Bolivia, consisting of 125 passive geodetic stations and 8 continuous recording GPS stations.
Densification of SIRGAS 1995 within Bolivia. Replaces PSAD56 (datum code 6248) in Bolivia.
Marcus Island 1952
Datum::fromSRID(Datum::EPSG_MARCUS_ISLAND_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6711')
Marcus Island Astronomic Station.
Marshall Islands 1960
Datum::fromSRID(Datum::EPSG_MARSHALL_ISLANDS_1960)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6732')
Martinique 1938
Datum::fromSRID(Datum::EPSG_MARTINIQUE_1938)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6625')
Fundamental point: Fort Desaix. Latitude: 14°36’54.090”N, longitude: 61°04’04.030”W (of Greenwich).
Replaced by RRAF 1991 (datum code 1047).
Martinique 1955
Datum::fromSRID(Datum::EPSG_MARTINIQUE_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5192')
Mean sea level at Fort de France 1939. Marker DO-4-II on quay wall with elevation of 1.38m above msl.
Orthometric heights. Replaced by Martinique 1987 (datum code 5154).
Martinique 1987
Datum::fromSRID(Datum::EPSG_MARTINIQUE_1987)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5154')
Mean sea level 1939 at Fort de France. Origin = marker Nbc2 on rebuilt quay wall with defined elevation of 1.38m above msl. Martinique 1987 height 0.00m is 0.56m above SHOM sounding datum.
Orthometric heights. Replaces Martinique 1955 (datum code 5192).
Massawa
Datum::fromSRID(Datum::EPSG_MASSAWA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6262')
Maupiti 83
Datum::fromSRID(Datum::EPSG_MAUPITI_83)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6692')
Fundamental point: Pitiahe South Base. Latitude: 16°28’28.942”S, longitude: 152°14’55.059”W (of Greenwich).
Replaced by RGPF (datum code 6687).
Maupiti SAU 2001
Datum::fromSRID(Datum::EPSG_MAUPITI_SAU_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5199')
Fundamental benchmark: RN11
Included as part of NGPF - see datum code 5195.
Mauritania 1999
Datum::fromSRID(Datum::EPSG_MAURITANIA_1999)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6702')
ITRF96 at epoch 1997.0
A network of 36 GPS stations tied to ITRF96, 8 of which are IGN 1962 astronomic points.
Mayotte 1950
Datum::fromSRID(Datum::EPSG_MAYOTTE_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5191')
IGN 1950 marker (height 0.0m) on southwest jetty at Dzaoudzi (Petite-Terre) is 2.18m above zero of tide gauge. SHOM 1953 marker on east (Issoufali) jetty at Dzaoudzi (height 4.74m) is the base for Mayotte heights.
Datum transferred to benchmark RN0 with height of 2.774m above tide gauge on eastern jetty at Mamoudzou (Grand-Terre) in 1979.
Mean High Water
Datum::fromSRID(Datum::EPSG_MEAN_HIGH_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1092')
Not specific to any location or epoch.
The average height of the high waters over a 19-year period.
Mean High Water Spring Tides
Datum::fromSRID(Datum::EPSG_MEAN_HIGH_WATER_SPRING_TIDES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1088')
Not specific to any location or epoch.
The average height of the high waters of spring tides.
Mean Higher High Water
Datum::fromSRID(Datum::EPSG_MEAN_HIGHER_HIGH_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1090')
Not specific to any location or epoch.
The average height of the higher high waters over a 19-year period.
Mean Low Water
Datum::fromSRID(Datum::EPSG_MEAN_LOW_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1091')
Not specific to any location or epoch.
The average height of all low waters over a 19-year period.
Mean Low Water Spring Tides
Datum::fromSRID(Datum::EPSG_MEAN_LOW_WATER_SPRING_TIDES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1087')
Not specific to any location or epoch.
The average height of the low waters of spring tides.
Mean Lower Low Water
Datum::fromSRID(Datum::EPSG_MEAN_LOWER_LOW_WATER)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1089')
Not specific to any location or epoch.
The average height of the lower low waters over a 19-year period.
Mean Lower Low Water Spring Tides
Datum::fromSRID(Datum::EPSG_MEAN_LOWER_LOW_WATER_SPRING_TIDES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1086')
Not specific to any location or epoch.
The average height of the lower low water spring tides.
Mean Sea Level
Datum::fromSRID(Datum::EPSG_MEAN_SEA_LEVEL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5100')
Not specific to any location or epoch.
The average height of the surface of the sea at a tide station for all stages of the tide over a 19-year period, usually determined from hourly height readings measured from a fixed predetermined reference level. Approximates geoid.
Mean Sea Level Netherlands
Datum::fromSRID(Datum::EPSG_MEAN_SEA_LEVEL_NETHERLANDS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1270')
Surface defined through the nlgeo geoid model applied to ETRS89.
Coincides with NAP datum plane. Approximates physical mean sea surface to a few decimetres.
Mean Sea Level UK & Ireland VORF08
Datum::fromSRID(Datum::EPSG_MEAN_SEA_LEVEL_UK_AND_IRELAND_VORF08)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1330')
MSL UK & Ireland VORF08 is defined by the Vertical Offshore Reference Frame v2.11 2008. MSL UK & Ireland VORF08 is reduced to epoch 2000.0.
OSGM05 model used.
Menorca
Datum::fromSRID(Datum::EPSG_MENORCA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1276')
Mean Sea Level at Ciutadella harbour between June 2007 and June 2008.
Orthometric heights.
Merchich
Datum::fromSRID(Datum::EPSG_MERCHICH)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6261')
Fundamental point: Merchich. Latitude: 33°26’59.672”N, longitude: 7°33’27.295”W (of Greenwich).
Mexico ITRF2008
Datum::fromSRID(Datum::EPSG_MEXICO_ITRF2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1120')
ITRF2008 at epoch 2010.00.
Realised by a frame of 15 active GPS stations observed and adjusted in the ITRF2008. Includes ties to tide gauges. Replaces Mexico ITRF92 (datum code 1042).
Mexico ITRF92
Datum::fromSRID(Datum::EPSG_MEXICO_ITRF92)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1042')
ITRF1992 at epoch 1988.00.
Realized by a frame of 15 active GPS stations observed and adjusted in the ITRF1992. Includes ties to tide gauges. Replaces NAD27 (datum code 6267). Replaced by Mexico ITRF2008 (datum code 1120) from December 2010.
Mhast (offshore)
Datum::fromSRID(Datum::EPSG_MHAST_OFFSHORE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6705')
Fundamental point: Station Y at Malongo base camp. Latitude: 5°23’30.810”S, longitude: 12°12’01.590”E (of Greenwich).
Origin coordinates determined by Transit single point position using 32 passes and transformed from WGS72BE using transformation code 15790. Differs from Mhast (onshore) by approximately 10m. Replaced in 1987 by Malongo 1987 (code 6259).
Mhast (onshore)
Datum::fromSRID(Datum::EPSG_MHAST_ONSHORE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6704')
Probably adopted a Mhast 1951 coordinate set but associated an incorrect ellipsoid with it.
Adopted by oil industry with intention of being Mhast 1951 (code 6703) but incorrectly (for Mhast 1951) used the International 1924 ellipsoid. This datum differs by about 400 metres from the Portuguese Mhast 1951 and Camacupa datums.
Midway 1961
Datum::fromSRID(Datum::EPSG_MIDWAY_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6727')
Militar-Geographische Institut
Datum::fromSRID(Datum::EPSG_MILITAR_GEOGRAPHISCHE_INSTITUT)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6312')
Fundamental point: Hermannskogel. Latitude: 48°16’15.29”N, longitude: 16°17’41.06”E (of Greenwich).
The longitude of the datum origin equates to a value for the Ferro meridian of 17°40’ exactly west of Greenwich.
Militar-Geographische Institut (Ferro)
Datum::fromSRID(Datum::EPSG_MILITAR_GEOGRAPHISCHE_INSTITUT_FERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6805')
Fundamental point: Hermannskogel. Latitude: 48°16’15.29”N, longitude: 33°57’41.06”E (of Ferro).
Replaced by MGI in Austria and MGI 1901 in former Yugoslavia.
Ministerio de Marina Norte
Datum::fromSRID(Datum::EPSG_MINISTERIO_DE_MARINA_NORTE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1258')
Developed by the Servicio de Hidrografia Naval.
Ministerio de Marina Sur
Datum::fromSRID(Datum::EPSG_MINISTERIO_DE_MARINA_SUR)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1259')
Developed by the Servicio de Hidrografia Naval.
Minna
Datum::fromSRID(Datum::EPSG_MINNA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6263')
Fundamental point: Minna base station L40. Latitude: 9°38’08.87”N, longitude: 6°30’58.76”E (of Greenwich).
Missao Hidrografico Angola y Sao Tome 1951
Datum::fromSRID(Datum::EPSG_MISSAO_HIDROGRAFICO_ANGOLA_Y_SAO_TOME_1951)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6703')
Extension of Camacupa datum into Cabinda.
A variation of this datum has been adopted by the oil industry but incorrectly using the International 1924 ellipsoid and not tied to the official Portuguese triangulation - see Mhast (onshore) and Mhast (offshore) (codes 6704 and 6705).
Monte Mario
Datum::fromSRID(Datum::EPSG_MONTE_MARIO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6265')
Fundamental point: Monte Mario. Latitude: 41°55’25.51”N, longitude: 12°27’08.4”E (of Greenwich).
Replaced Genova datum, Bessel 1841 ellipsoid, from 1940.
Monte Mario (Rome)
Datum::fromSRID(Datum::EPSG_MONTE_MARIO_ROME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6806')
Fundamental point: Monte Mario. Latitude: 41°55’25.51”N, longitude: 0°00’ 00.00”E (of Rome).
Replaced Genova datum, Bessel 1841 ellipsoid, from 1940.
Montserrat 1958
Datum::fromSRID(Datum::EPSG_MONTSERRAT_1958)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6604')
Fundamental point: station M36.
Moorea 87
Datum::fromSRID(Datum::EPSG_MOOREA_87)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6691')
Two stations on Tahiti whose coordinates from the Tahiti 1979 adjustment were held fixed.
Replaces Tahiti 52 (datum code 6628) in Moorea. Replaced by RGPF (datum code 6687).
Moorea SAU 1981
Datum::fromSRID(Datum::EPSG_MOOREA_SAU_1981)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5197')
Fundamental benchmark: RN225
Included as part of NGPF - see datum code 5195.
Moturiki 1953
Datum::fromSRID(Datum::EPSG_MOTURIKI_1953)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5162')
MSL at Moturiki Island February 1949 to December 1952.
Mount Dillon
Datum::fromSRID(Datum::EPSG_MOUNT_DILLON)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6157')
Fundamental point: Mount Dillon triangulation station. Latitude: 11°15’07.843”N, longitude: 60°41’09.632”W (of Greenwich).
Moznet (ITRF94)
Datum::fromSRID(Datum::EPSG_MOZNET_ITRF94)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6130')
ITRF94 at epoch 1996.9
N2000
Datum::fromSRID(Datum::EPSG_N2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1030')
Height at Metsaahovi (latitude 60.21762°N, longitude 24.39517°E) of 54.4233m related to EVRF2000 origin through Baltic Levelling Ring adjustment at epoch 2000.0.
Realized through the third precise levelling network. Uses normal heights. Replaces N43 and N60 (datum codes 1213 and 5116). To account for isostatic land uplift use NKG2005 model.
NAD83 (Continuously Operating Reference Station 1996)
Datum::fromSRID(Datum::EPSG_NAD83_CONTINUOUSLY_OPERATING_REFERENCE_STATION_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1133')
Defined by time-dependent transformations from ITRF (see CT codes 6864-6866). The ITRF realization used has been changed periodically; ITRF96 in years 1997 through 1999, ITRF97 in 2000 and 2001 and ITRF2000 from 2002.
Replaced by NAD83(2011) from 2011-09-06.
NAD83 (Federal Base Network)
Datum::fromSRID(Datum::EPSG_NAD83_FEDERAL_BASE_NETWORK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1211')
A collection of individual state-wide adjustments including GPS observations made between 1997 and 2004.
In CA CT FL ID MA ME MT NC NH NJ NV NY OR RI SC TN VT WA and WI, replaces the early 1990s HARN adjustment. In rest of CONUS the difference between the HARN and FBN adjustments was under 5cm and the original HARN adjustments were adopted as NAD83(FBN).
NAD83 (High Accuracy Reference Network - Corrected)
Datum::fromSRID(Datum::EPSG_NAD83_HIGH_ACCURACY_REFERENCE_NETWORK_CORRECTED)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1212')
In PRVI replaces NAD83(HARN) to correct errors. Replaced by NAD83(FBN).
NAD83 (High Accuracy Reference Network)
Datum::fromSRID(Datum::EPSG_NAD83_HIGH_ACCURACY_REFERENCE_NETWORK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6152')
A collection of individual state-wide adjustments including GPS observations made between 1991 and 1996.
In CONUS, American Samoa and Guam replaced by NAD83(FBN). In Alaska replaced by NAD83(NSRS2007). In Hawaii replaced by NAD83(PA11). In Puerto Rico and US Virgin Islands replaced by NAD83(HARN Corrected).
NAD83 (National Spatial Reference System 2007)
Datum::fromSRID(Datum::EPSG_NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_2007)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6759')
Coordinates of 486 national continually operating reference system (CORS) and 195 collaborative GPS (CGPS) sites constrained to their CORS96 values, ITRF2000 at epoch 2002.0.
Replaced by NAD83 (National Spatial Reference System 2011), datum code 1116.
NAD83 (National Spatial Reference System 2011)
Datum::fromSRID(Datum::EPSG_NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_2011)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1116')
Coordinates of a nationwide adjustment of 79,546 NGS “passive” control stations in CONUS and Alaska, constrained to 1,171 current CORS station coordinates at epoch 2010.0.
Replaces NAD83(NSRS2007). Transformaton code 7807 from ITRF2008 is understood to underlay the CORS station coordinates.
NAD83 (National Spatial Reference System MA11)
Datum::fromSRID(Datum::EPSG_NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_MA11)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1118')
Coordinates of a nationwide adjustment including 171 NGS “passive” control stations constrained to 24 current Pacific CORS station coordinates at epoch 2010.0.
Replaces NAD83(HARN) (GGN93) and NAD83(FBN) in Guam. ITRF2008 is understood to underlay the latest CORS station coordinates.
NAD83 (National Spatial Reference System PA11)
Datum::fromSRID(Datum::EPSG_NAD83_NATIONAL_SPATIAL_REFERENCE_SYSTEM_PA11)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1117')
Coordinates of a nationwide adjustment including 345 NGS “passive” control stations constrained to 24 current Pacific CORS station coordinates at epoch 2010.0.
Replaces NAD83(HARN) and NAD83(FBN) in Hawaii and American Samoa. ITRF2008 is understood to underlay the latest CORS station coordinates.
NAD83 Canadian Spatial Reference System
Datum::fromSRID(Datum::EPSG_NAD83_CANADIAN_SPATIAL_REFERENCE_SYSTEM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6140')
Includes all versions of NAD83(CSRS) from v2 [CSRS98] onwards without specific identification. As such it has an accuracy of approximately 1m.
NEA74 Noumea
Datum::fromSRID(Datum::EPSG_NEA74_NOUMEA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6644')
Noumea old signal station.
NGO 1948
Datum::fromSRID(Datum::EPSG_NGO_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6273')
Fundamental point: Oslo observatory. Latitude: 59°54’43.7”N, longitude: 10°43’22.5”E (of Greenwich).
NGO 1948 (Oslo)
Datum::fromSRID(Datum::EPSG_NGO_1948_OSLO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6817')
Fundamental point: Oslo observatory. Latitude: 59°54’43.7”N, longitude: 0°00’00.0”E (of Oslo).
NSWC 9Z-2
Datum::fromSRID(Datum::EPSG_NSWC_9Z_2)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6276')
Transit precise ephemeris before 1991.
Nahrwan 1934
Datum::fromSRID(Datum::EPSG_NAHRWAN_1934)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6744')
Fundamental point: Nahrwan south base. Latitude: 33°19’10.87”N, longitude: 44°43’25.54”E (of Greenwich).
This adjustment later discovered to have a significant orientation error. In Iran replaced by FD58. In Iraq, replaced by Karbala 1979.
Nahrwan 1967
Datum::fromSRID(Datum::EPSG_NAHRWAN_1967)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6270')
Fundamental point: Nahrwan south base. Latitude: 33°19’10.87”N, longitude: 44°43’25.54”E (of Greenwich).
Nakhl-e Ghanem
Datum::fromSRID(Datum::EPSG_NAKHL_E_GHANEM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6693')
Coordinates of two stations determined with respect to ITRF 2000 at epoch 2005.2: BMT1 latitude 27°42’09.8417”N, longitude 52°12’11.0362”E (of Greenwich); Total1 latitude 27°31’03.8896”N, longitude 52°36’13.1312”E (of Greenwich).
Naparima 1955
Datum::fromSRID(Datum::EPSG_NAPARIMA_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6158')
Fundamental point: Naparima. Latitude: 10°16’44.860”N, longitude: 61°27’34.620”W (of Greenwich).
Extended to Tobago as Naparima 1972. (Note: Naparima 1972 is not used in Trinidad).
Naparima 1972
Datum::fromSRID(Datum::EPSG_NAPARIMA_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6271')
Fundamental point: Naparima. Latitude: 10°16’44.860”N, longitude: 61°27’34.620”W (of Greenwich).
Naparima 1972 is an extension to Tobago of the Naparima 1955 network of Trinidad.
Napier 1962
Datum::fromSRID(Datum::EPSG_NAPIER_1962)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5163')
MSL at Napier harbour. Period of derivation unknown.
National Geodetic Network
Datum::fromSRID(Datum::EPSG_NATIONAL_GEODETIC_NETWORK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6318')
Replaces 1984 adjustment which used the WGS72 ellipsoid.
National Geodetic Vertical Datum 1929
Datum::fromSRID(Datum::EPSG_NATIONAL_GEODETIC_VERTICAL_DATUM_1929)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5102')
26 tide gauges in the US and Canada.
Normal orthometric heights.
National Vertical Datum 1992
Datum::fromSRID(Datum::EPSG_NATIONAL_VERTICAL_DATUM_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1303')
Mean Sea Level 1992-1994 at tidal station at Rangadia, Chittagong.
Nelson 1955
Datum::fromSRID(Datum::EPSG_NELSON_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5164')
MSL at Nelson harbour 1939-1942.
Nepal 1981
Datum::fromSRID(Datum::EPSG_NEPAL_1981)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1111')
Fundamental point: Station 12/157 Nagarkot. Latitude: 27°41’31.04”N, longitude: 85°31’20.23”E (of Greenwich).
New Beijing
Datum::fromSRID(Datum::EPSG_NEW_BEIJING)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1045')
Derived by conformal transformation of Xian 1980 adjustment onto Krassowsky ellipsoid.
From 1982 replaces Beijing 1954.
New Zealand Geodetic Datum 1949
Datum::fromSRID(Datum::EPSG_NEW_ZEALAND_GEODETIC_DATUM_1949)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6272')
Fundamental point: Papatahi. Latitude: 41°19’ 8.900”S, longitude: 175°02’51.000”E (of Greenwich).
Replaced by New Zealand Geodetic Datum 2000 (code 6167) from March 2000.
New Zealand Geodetic Datum 2000
Datum::fromSRID(Datum::EPSG_NEW_ZEALAND_GEODETIC_DATUM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6167')
Based on ITRF96 at epoch 2000.0
Replaces New Zealand Geodetic Datum 1949 (code 6272) and Chatham Islands Datum 1979 (code 6673) from March 2000.
New Zealand Vertical Datum 2009
Datum::fromSRID(Datum::EPSG_NEW_ZEALAND_VERTICAL_DATUM_2009)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1039')
New Zealand Quasigeoid 2009 which is defined by the application of the NZ geoid 2009 grid to NZGD2000 ellipsoidal heights. See transformation code 4459.
New Zealand Vertical Datum 2016
Datum::fromSRID(Datum::EPSG_NEW_ZEALAND_VERTICAL_DATUM_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1169')
New Zealand quasigeoid 2016 which is defined by the application of the NZ geoid 2016 grid to NZGD2000 ellipsoidal heights. See transformation code 7840.
Nivellement General Guyanais 1977
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_GUYANAIS_1977)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5153')
Mean sea level 1936 at Cayenne. Origin = marker BM35 on stone on St Francois battery, Cayenne, with defined elevation of 1.64m above msl. NGG1977 height 0.00m is 1.96m above sounding datum defined at Cayenne in 1936 by SHM.
Orthometric heights.
Nivellement General de Nouvelle Caledonie
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_NOUVELLE_CALEDONIE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5151')
Rivet AB01 established by SHOM (Service Hydrographique de la Marine) in 1937 on the Quai des Volontaires in Noumea. Height i: 1.885 metre above mean sea level.
Orthometric heights.
Nivellement General de Nouvelle Caledonie 2008
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_NOUVELLE_CALEDONIE_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1255')
Normal heights.
Nivellement General de Polynesie Francaise
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_POLYNESIE_FRANCAISE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5195')
The collection of heterogeneous levelling networks throughout the Society Islands of French Polynesia.
Nivellement General de la Corse 1948
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_LA_CORSE_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5189')
Mean sea level at Ajaccio between 1912 and 1937.
Replaced by IGN78 Corsica (datum 5120).
Nivellement General de la France - IGN69
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_LA_FRANCE_IGN69)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5119')
Rivet number M.ac O-VIII on the Marseille tide gauge site, with the height fixed in 1897 at 1.661 metre above mean sea level between February 2nd 1885 and January 1st 1897.
Uses Normal heights.
Nivellement General de la France - IGN78
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_LA_FRANCE_IGN78)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5120')
Marker MM3 situated on the tide gauge site of Ajaccio. Height is 3.640 metre above mean sea level.
Uses Normal heights. Replaces NGC (datum code 5189).
Nivellement General de la France - Lallemand
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DE_LA_FRANCE_LALLEMAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5118')
Rivet number M.ac O-VIII on the Marseille tide gauge site, with the height fixed in 1897 at 1.661 metre above mean sea level between February 2nd 1885 and January 1st 1897.
Orthometric heights.
Nivellement General du Luxembourg 1995
Datum::fromSRID(Datum::EPSG_NIVELLEMENT_GENERAL_DU_LUXEMBOURG_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5172')
Reference point Wemperhardt defined as 528.030m above Normaal Amsterdams Peil (NAP). Datum at NAP is mean high tide in 1684. Network adjusted in 1995.
Pseudo-orthometric heights.
Nord Sahara 1959
Datum::fromSRID(Datum::EPSG_NORD_SAHARA_1959)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6307')
Coordinates of primary network readjusted on ED50 datum and then transformed conformally to Clarke 1880 (RGS) ellipsoid.
Adjustment includes Morocco and Tunisia but use only in Algeria. Within Algeria the adjustment is north of 32°N but use has been extended southwards in many disconnected projects, some based on independent astro stations rather than the geodetic network.
Normaal Amsterdams Peil
Datum::fromSRID(Datum::EPSG_NORMAAL_AMSTERDAMS_PEIL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5109')
Mean high tide at Amsterdam in 1684. Onshore NAP is defined by the published heights of benchmarks and since 2018 extended offshore defined by the application of the official transformation from ETRS89, RDNAPTRANS(TM).
Orthometric heights. From 2018, use has been extended from Netherlands onshore to Netherlands onshore and offshore.
North American Datum 1927
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_1927)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6267')
Fundamental point: Meade’s Ranch. Latitude: 39°13’26.686”N, longitude: 98°32’30.506”W (of Greenwich).
In United States (USA) and Canada, replaced by North American Datum 1983 (NAD83) (code 6269) ; in Mexico, replaced by Mexican Datum of 1993 (code 1042).
North American Datum 1927 (1976)
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_1927_1976)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6608')
Fundamental point: Meade’s Ranch. Latitude: 39°13’26.686”N, longitude: 98°32’30.506”W (of Greenwich).
NAD27(76) used in Ontario for all maps at scale 1/20 000 and larger; elsewhere in Canada for selected purposes.
North American Datum 1927 (CGQ77)
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_1927_CGQ77)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6609')
Fundamental point: Meade’s Ranch. Latitude: 39°13’26.686”N, longitude: 98°32’30.506”W (of Greenwich).
NAD27 (CGQ77) used in Quebec for all maps at scale 1/20 000 and larger; generally for maps issued by the Quebec cartography office whose reference system is CGQ77.
North American Datum 1983
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_1983)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6269')
NAD83 Doppler Transit stations in NWL 9D were aligned with the BIH Conventional Terrestrial Reference Frame (BTS) at epoch 1984.0 using an internationally adopted transformation. NAD83 is now known to be non-geocentric by about 2.2 meters.
Although the 1986 adjustment included connections to Greenland and Mexico, it has not been adopted there. In Canada and US, replaced NAD27.
North American Datum of 1983 (CSRS) version 2
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_2)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1193')
Defined at reference epoch 1997.0 by a transformation from ITRF96 (see transformation code 8259). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 1998-01-01; adopted by the Canadian federal government and the provincial governments of Alberta, Saskatchewan, Manitoba, Quebec, New Brunswick and Prince Edward Island. Replaces NAD83(CSRS96). Replaced by NAD83(CSRS)v3.
North American Datum of 1983 (CSRS) version 3
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_3)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1194')
Defined at reference epoch 1997.0 by a transformation from ITRF97 (see transformation code 8260). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 1999-01-01; adopted by the Canadian federal government (2000) and the provincial governments of British Columbia (CRD in 2000, all Victoria Island 2005), Ontario (2008) and Nova Scotia (2000). Replaces NAD83(CSRS)v2. Replaced by NAD83(CSRS)v4.
North American Datum of 1983 (CSRS) version 4
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_4)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1195')
Defined at reference epoch 2002.0 by a transformation from ITRF2000 (see transformation code 8261). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 2002-01-01; adopted by the Canadian federal government (2002) and the provincial governments of British Columbia (for mainland only, not Victoria Island) (2005) and Alberta (2004). Replaces NAD83(CSRS)v3. Replaced by NAD83(CSRS)v5.
North American Datum of 1983 (CSRS) version 5
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_5)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1196')
Defined at reference epoch 2006.0 by a transformation from ITRF2005 (see transformation code 9227). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 2007-01-01; adopted by the Canadian federal government in 2007. Replaces NAD83(CSRS)v4. Replaced by NAD83(CSRS)v6.
North American Datum of 1983 (CSRS) version 6
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_6)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1197')
Defined at reference epoch 2010.0 by a transformation from ITRF2008 (see transformation code 8264). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 2010-01-01; adopted by the Canadian government (2012) and the provincial governments of Manitoba (2014), Ontario (2013), Prince Edward Island (2014), Nova Scotia (2014) and Newfoundland (2012). Replaces NAD83(CSRSv5). Replaced by NAD83(CSRS)v7.
North American Datum of 1983 (CSRS) version 7
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS_VERSION_7)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1198')
Defined at reference epoch 2010.0 by a transformation from ITRF2014 (see transformation code 8265). The frame is kept aligned with the North American tectonic plate at other epochs using the NNR-Nuvel 1A model.
Published 2017-05-01; adopted by the Canadian federal government (2017) and the provincial governments of Alberta (2021) and Prince Edward Island (2020). Replaces NAD83(CSRS)v6.
North American Datum of 1983 (CSRS96)
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_CSRS96)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1192')
Defined at epoch 1988.0 by a transformation from ITRF92, the definition superseded by a transformation from ITRF93 and then by a transformation from ITRF94. (See transformation codes 8256-58).
Adopted by the Canadian federal government from 1996-01-01. Replaces NAD83 [sometimes called NAD83(Original)]. Replaced by NAD83(CSRS)v2.
North American Datum of 1983 (MARP00)
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_MARP00)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1221')
Defined by a time-dependent seven parameter transformation of ITRF2000 3D geocentric Cartesian coordinates and velocities at reference epoch 1993.62, aligned to the Mariana plate at other epochs based on an Euler pole rotation.
Replaces NAD83(HARN) (GGN93) and NAD83(FBN) in Guam. Replaced by NAD83(MA11).
North American Datum of 1983 (PACP00)
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_DATUM_OF_1983_PACP00)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1249')
Defined by a time-dependent seven parameter transformation of ITRF2000 3D geocentric Cartesian coordinates and velocities at reference epoch 1993.62, aligned to the Pacific plate at other epochs based on an Euler pole rotation.
Replaces NAD83(HARN) and NAD83(FBN) in Hawaii and American Samoa. Replaced by NAD83(PA11).
North American Vertical Datum 1988
Datum::fromSRID(Datum::EPSG_NORTH_AMERICAN_VERTICAL_DATUM_1988)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5103')
Mean water level 1970-1983 at Pointe-au-Père (Father’s Point) and 1984-1988 at Rimouski, Quebec. Benchmark 1250-G = 6.273m.
Helmert orthometric heights.
North Rona
Datum::fromSRID(Datum::EPSG_NORTH_RONA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5143')
Orthometric heights.
Northern Marianas Vertical Datum of 2003
Datum::fromSRID(Datum::EPSG_NORTHERN_MARIANAS_VERTICAL_DATUM_OF_2003)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1119')
Mean sea level at Tanapag harbor, Saipan. Benchmark 1633227 TIDAL UH-2C = 1.657m relative to National Tidal Datum Epoch 1983-2001. Transferred to Rota (East Harbor, BM TIDAL 3 = 1.482m) and Tinian (Harbor BM TIDAL 1 = 2.361m).
Replaces all earlier vertical datums on these islands.
Norway Normal Null 1954
Datum::fromSRID(Datum::EPSG_NORWAY_NORMAL_NULL_1954)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5174')
MSL defined by regression at 7 gauges with between 17 and 67 years observations.
Includes initial NN1954 system and NNN1957 system. Former name retained. Normal-orthometric heights. Replaced by NN2000.
Norway Normal Null 2000
Datum::fromSRID(Datum::EPSG_NORWAY_NORMAL_NULL_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1096')
Adjustment is referenced to mean high tide at Amsterdams Peil in 1684. To account for land level movements caused by isostatic rebound, heights are reduced to epoch 2000.0 using values computed from the NKG2005LU uplift model.
Replaces NN54. Uses Normal heights.
Norwegian Chart Datum
Datum::fromSRID(Datum::EPSG_NORWEGIAN_CHART_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1301')
LAT (sum of all harmonic constituents) with an added safety margin in areas where low water levels frequently deviate from LAT. The safety margin is 20 cm from Utsira to the Swedish border and 30 cm in the inner part of the Oslofjord (north of Drøbak).
Prior to 2000-01-01 the definition of chart datum was Z0 = M2 + S2 + N2 + K2 + K1 + ½Sa plus safety margins (10 cm north of Hordaland, 20 cm in Hordaland, 30 cm from Rogaland to the Swedish border and 40 cm in the inner parts of the Oslofjord).
Not specified (based on Airy 1830 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_AIRY_1830_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6001')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Airy Modified 1849 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_AIRY_MODIFIED_1849_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6002')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Australian National Spheroid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_AUSTRALIAN_NATIONAL_SPHEROID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6003')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Average Terrestrial System 1977 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_AVERAGE_TERRESTRIAL_SYSTEM_1977_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6041')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Bessel 1841 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_BESSEL_1841_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6004')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Bessel Modified ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_BESSEL_MODIFIED_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6005')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Bessel Namibia ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_BESSEL_NAMIBIA_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6006')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1858 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1858_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6007')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1866 Authalic Sphere)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1866_AUTHALIC_SPHERE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6052')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1866 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1866_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6008')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 (Arc) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_ARC_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6013')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 (Benoit) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_BENOIT_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6010')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 (IGN) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_IGN_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6011')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 (RGS) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_RGS_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6012')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 (SGA 1922) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_SGA_1922_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6014')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Clarke 1880 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_CLARKE_1880_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6034')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest (1830 Definition) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_DEFINITION_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6042')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest 1830 (1937 Adjustment) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_1937_ADJUSTMENT_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6015')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest 1830 (1962 Definition) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_1962_DEFINITION_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6044')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest 1830 (1967 Definition) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_1967_DEFINITION_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6016')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest 1830 (1975 Definition) ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_1975_DEFINITION_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6045')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Everest 1830 Modified ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_EVEREST_1830_MODIFIED_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6018')
Included for coordinate reference systems where datum is unknown.
Not specified (based on GEM 10C ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_GEM_10C_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6031')
Included for coordinate reference systems where datum is unknown.
Not specified (based on GRS 1967 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_GRS_1967_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6036')
Included for coordinate reference systems where datum is unknown.
Not specified (based on GRS 1980 Authalic Sphere)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_GRS_1980_AUTHALIC_SPHERE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6047')
Included for coordinate reference systems where datum is unknown.
Not specified (based on GRS 1980 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_GRS_1980_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6019')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Helmert 1906 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_HELMERT_1906_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6020')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Hughes 1980 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_HUGHES_1980_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6054')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Indonesian National Spheroid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INDONESIAN_NATIONAL_SPHEROID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6021')
Included for coordinate reference systems where datum is unknown.
Not specified (based on International 1924 Authalic Sphere)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INTERNATIONAL_1924_AUTHALIC_SPHERE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6053')
Included for coordinate reference systems where datum is unknown.
Not specified (based on International 1924 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INTERNATIONAL_1924_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6022')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Krassowsky 1940 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_KRASSOWSKY_1940_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6024')
Included for coordinate reference systems where datum is unknown.
Not specified (based on NWL 9D ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_NWL_9D_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6025')
Included for coordinate reference systems where datum is unknown.
Not specified (based on OSU86F ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_OSU86F_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6032')
Included for coordinate reference systems where datum is unknown.
Not specified (based on OSU91A ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_OSU91A_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6033')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Plessis 1817 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_PLESSIS_1817_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6027')
Included for coordinate reference systems where datum is unknown.
Not specified (based on Struve 1860 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_STRUVE_1860_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6028')
Included for coordinate reference systems where datum is unknown.
Not specified (based on WGS 72 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WGS_72_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6043')
Included for coordinate reference systems where datum is unknown.
Not specified (based on WGS 84 ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WGS_84_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6030')
Included for coordinate reference systems where datum is unknown.
Not specified (based on War Office ellipsoid)
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WAR_OFFICE_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6029')
Included for coordinate reference systems where datum is unknown.
Nouakchott 1965
Datum::fromSRID(Datum::EPSG_NOUAKCHOTT_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6680')
Nouakchott astronomical point.
Triangulation limited to environs of Nouakchott. Extended in 1982 by satellite translocation from a single station “Ruines” to support Syledis chain for offshore operations. Replaced by Mauritania 1999 (datum code 6602).
Nouvelle Triangulation Francaise
Datum::fromSRID(Datum::EPSG_NOUVELLE_TRIANGULATION_FRANCAISE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6275')
Fundamental point: Pantheon. Latitude: 48°50’46.522”N, longitude: 2°20’48.667”E (of Greenwich).
Nouvelle Triangulation Francaise (Paris)
Datum::fromSRID(Datum::EPSG_NOUVELLE_TRIANGULATION_FRANCAISE_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6807')
Fundamental point: Pantheon. Latitude: 54.273618g N, longitude: 0.0106921g E (of Paris).
OS (SN) 1980
Datum::fromSRID(Datum::EPSG_OS_SN_1980)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6279')
Fundamental point: Herstmonceux. Latitude: 50°51’55.271”N, longitude: 0°20’45.882”E (of Greenwich).
OSGB 1970 (SN)
Datum::fromSRID(Datum::EPSG_OSGB_1970_SN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6278')
Fundamental point: Herstmonceux. Latitude: 50°51’55.271”N, longitude: 0°20’45.882”E (of Greenwich).
OSNI 1952
Datum::fromSRID(Datum::EPSG_OSNI_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6188')
Position fixed to the coordinates from the 19th century Principle Triangulation of station Divis. Scale and orientation controlled by position of Principle Triangulation stations Knocklayd and Trostan.
Replaced by Geodetic Datum of 1965 alias 1975 Mapping Adjustment or TM75 (datum code 6300).
Observatario
Datum::fromSRID(Datum::EPSG_OBSERVATARIO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6129')
Fundamental point: Campos Rodrigues observatory, Maputo.
Replaced by transformation to Tete datum (datum code 6127).
Ocotepeque 1935
Datum::fromSRID(Datum::EPSG_OCOTEPEQUE_1935)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1070')
Fundamental point: Base Norte. Latitude: 14°26’20.168”N, longitude: 89°11’33.964”W.
Replaced in Costa Rica by Costa Rica 2005 (CR05) from March 2007 and replaced in El Salvador by SIRGAS_ES2007 from August 2007.
Old Hawaiian
Datum::fromSRID(Datum::EPSG_OLD_HAWAIIAN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6135')
Fundamental point: Oahu West Base Astro. Latitude: 21°18’13.89”N, longitude 157°50’55.79”W (of Greenwich)
Hawaiian Islands were never on NAD27 but rather on Old Hawaiian Datum. NADCON conversion program provides transformation from Old Hawaiian Datum to NAD83 (original 1986 realization) but making the transformation appear to user as if from NAD27.
Oman National Geodetic Datum 2014
Datum::fromSRID(Datum::EPSG_OMAN_NATIONAL_GEODETIC_DATUM_2014)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1147')
20 stations of the Oman primary network tied to ITRF2008 at epoch 2013.15.
Replaces WGS 84 (G873). Replaced by ONGD17.
Oman National Geodetic Datum 2017
Datum::fromSRID(Datum::EPSG_OMAN_NATIONAL_GEODETIC_DATUM_2017)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1263')
Oman primary network of 39 stations tied to ITRF2014 at epoch 2017.24.
Replaces ONGD14 from March 2019.
One Tree Point 1964
Datum::fromSRID(Datum::EPSG_ONE_TREE_POINT_1964)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5165')
MSL at Whangarei harbour 1960-1963.
Ordnance Datum Newlyn
Datum::fromSRID(Datum::EPSG_ORDNANCE_DATUM_NEWLYN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5101')
Mean Sea Level at Newlyn between 1915 and 1921. Initially realised through 1921 and then 1956 levelling network adjustments. From 2002 redefined to be realised through OSGM geoid models.
Orthometric heights.
Ordnance Datum Newlyn (Offshore)
Datum::fromSRID(Datum::EPSG_ORDNANCE_DATUM_NEWLYN_OFFSHORE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1164')
Defined by OSGM geoid model.
Extension of Ordnance Datum Newlyn offshore through geoid model. Orthometric heights.
Ordnance Datum Newlyn (Orkney Isles)
Datum::fromSRID(Datum::EPSG_ORDNANCE_DATUM_NEWLYN_ORKNEY_ISLES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5138')
Connected to Newlyn datum by triangulation from the British mainland. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Considered as separate from Newlyn because the accuracy of the trigonometric connection across the Pentland Firth does not meet geodetic levelling specifications. Orthometric heights.
Ordnance Survey of Great Britain 1936
Datum::fromSRID(Datum::EPSG_ORDNANCE_SURVEY_OF_GREAT_BRITAIN_1936)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6277')
Prior to 2002 fundamental point: Herstmonceux, Latitude: 50°51’55.271”N, longitude: 0°20’45.882”E, triangulation adjustment started 1936, completed 1962. From April 2002 the datum is defined through the application of the OSTN transformation from ETRS89.
The average accuracy of OSTN compared to the old triangulation network (down to 3rd order) is 0.1m. With the introduction of OSTN15, the area for OGSB36 has effectively been extended from Britain to cover the adjacent UK Continental Shelf.
Ostend
Datum::fromSRID(Datum::EPSG_OSTEND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5110')
Mean low water at Ostend 1855-78 transferred to benchmark GIKMN at Uccle.
Realized through the second general levelling (DNG or TAW) 1981-1999.
PDO Height Datum 1993
Datum::fromSRID(Datum::EPSG_PDO_HEIGHT_DATUM_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5123')
Misclosure between Muscat and Salalah less than .5 meters with differences from of up to 5 meters from old Fahud Datum. The PHD93 adjustment was initially known as the Spine. Replaces Fahud Vertical Datum (code 5124) from 1993.
PDO Survey Datum 1993
Datum::fromSRID(Datum::EPSG_PDO_SURVEY_DATUM_1993)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6134')
Adjustment best fitted to Fahud network.
Replaces Fahud datum (code 6232). Maximum differences to Fahud adjustment are 20 metres.
PNG08
Datum::fromSRID(Datum::EPSG_PNG08)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1149')
Mean sea level at 8 tide gauges around PNG, defined through application of PNG08 geoid model (transformation code 7655) to PNG94 (CRS code 5545).
Palestine 1923
Datum::fromSRID(Datum::EPSG_PALESTINE_1923)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6281')
Fundamental point: Point 82’M Jerusalem. Latitude: 31°44’ 2.749”N, longitude: 35°12’43.490”E (of Greenwich).
Pampa del Castillo
Datum::fromSRID(Datum::EPSG_PAMPA_DEL_CASTILLO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6161')
Replaced by Campo Inchauspe (code 6221) for topographic mapping, use for oil exploration and production in Golfo San Jorge basin (44°S to 47.5°S) continues.
Panama-Colon 1911
Datum::fromSRID(Datum::EPSG_PANAMA_COLON_1911)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1072')
Fundamental point: Balboa Hill. Latitude: 09°04’57.637”N, longtitude: 79°43’50.313”W.
Reports of the existence of an Ancon datum are probably erroneous, considering that the origin of the Panamá-Colón Datum of 1911 is at Balboa Hill and the access road up the hill is from the town of Ancon, Canal Zone.
Papua New Guinea Geodetic Datum 1994
Datum::fromSRID(Datum::EPSG_PAPUA_NEW_GUINEA_GEODETIC_DATUM_1994)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1076')
ITRF92 at epoch 1994.0.
Adopted 1996. Coincident with WGS 84 in 1994 but rapidly divergent due to significant tectonic motion in PNG.
Parametry Zemli 1990
Datum::fromSRID(Datum::EPSG_PARAMETRY_ZEMLI_1990)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6740')
Defined through coordinates of stations of the satellite geodetic network (SGN) in Russia at epoch 1990.0.
Replaced by PZ-90.02 from 2007-09-20.
Parametry Zemli 1990.02
Datum::fromSRID(Datum::EPSG_PARAMETRY_ZEMLI_1990_02)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1157')
Defined through coordinates of 33 stations of the satellite geodetic network (SGN) in Russia and Antarctica adjusted to a subset of 14 IGS stations in Russia at epoch 2002.0. The IGS station coordinates are considered to be equivalent to ITRF2000.
Replaces PZ-90 from 2007-09-20. Replaced by PZ-90.11 from 2014-01-15.
Parametry Zemli 1990.11
Datum::fromSRID(Datum::EPSG_PARAMETRY_ZEMLI_1990_11)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1158')
Defined through coordinates of 33 stations of the satellite geodetic network (SGN) in Russia and Antarctica adjusted to a subset of 14 IGS stations in Russia at epoch 2010.0. The IGS station coordinates are considered to be equivalent to ITRF2008.
Replaces PZ-90.02 from 2014-01-15.
Peru96
Datum::fromSRID(Datum::EPSG_PERU96)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1067')
Densification of SIRGAS95 network (ITRF94 at epoch 1995.4) in Peru, consisting of 47 passive geodetic stations and 3 continuous recording GPS stations.
Densification of SIRGAS 1995 within Peru. Replaces PSAD56 (datum code 6248) in Peru.
Petrels 1972
Datum::fromSRID(Datum::EPSG_PETRELS_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6636')
Fundamental point: Astro station DZ on Ile de Petrels. Latitude: 66°40’00”S, longitude: 140°00’46”E (of Greenwich).
Philippine Reference System 1992
Datum::fromSRID(Datum::EPSG_PHILIPPINE_REFERENCE_SYSTEM_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6683')
Fundamental point: Balacan. Latitude: 13°33’41.000”N, longitude: 121°52’03.000”E (of Greenwich), geoid-ellipsoid separation 0.34m.
Replaces Luzon 1911 datum (code 6253).
Phoenix Islands 1966
Datum::fromSRID(Datum::EPSG_PHOENIX_ISLANDS_1966)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6716')
Pico de las Nieves 1968
Datum::fromSRID(Datum::EPSG_PICO_DE_LAS_NIEVES_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1286')
Pico de las Nieves mountain, Gran Canaria. The fundamental point is a different station to that for PN84.
Replaced by PN84 only on western islands (El Hierro, La Gomera, La Palma and Tenerife). Both PN68 and PN84 replaced by REGCAN95.
Pico de las Nieves 1984
Datum::fromSRID(Datum::EPSG_PICO_DE_LAS_NIEVES_1984)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6728')
Pico de las Nieves mountain, Gran Canaria. The fundamental point is a different station to that for PN68.
Replaces Pico de las Nieves 1968 (PN68) only on western islands (El Hierro, La Gomera, La Palma and Tenerife). Replaced by REGCAN95.
Piraeus Harbour 1986
Datum::fromSRID(Datum::EPSG_PIRAEUS_HARBOUR_1986)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5115')
MSL determined during 1986.
Pitcairn 1967
Datum::fromSRID(Datum::EPSG_PITCAIRN_1967)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6729')
Fundamental point: Pitcairn Astro. Latitude: 25°04’06.87”S, longitude: 130°06’47.83”W (of Greenwich).
Replaced by Pitcairn 2006.
Pitcairn 2006
Datum::fromSRID(Datum::EPSG_PITCAIRN_2006)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6763')
Fundamental point: Pitcairn Astro. Latitude: 25°04’06.7894”S, longitude: 130°06’46.6816”W (of Greenwich), derived by single point GPS oberservations.
Replaces Pitcairn 1967.
Point 58
Datum::fromSRID(Datum::EPSG_POINT_58)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6620')
Fundamental point: Point 58. Latitude: 12°52’44.045”N, longitude: 3°58’37.040”E (of Greenwich).
Used as the basis for computation of the 12th Parallel traverse conducted 1966-70 from Senegal to Chad and connecting to the Blue Nile 1958 (Adindan) triangulation in Sudan.
Pointe Geologie Perroud 1950
Datum::fromSRID(Datum::EPSG_POINTE_GEOLOGIE_PERROUD_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6637')
Fundamental point: Astro station G.0 on Pointe Geologie. Latitude: 66°39’30”S, longitude: 140°01’00”E (of Greenwich).
Ponta Delgada
Datum::fromSRID(Datum::EPSG_PONTA_DELGADA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1110')
Mean Sea Level during 1991 at Ponta Delgada.
Orthometric heights.
Poolbeg
Datum::fromSRID(Datum::EPSG_POOLBEG)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5152')
Low water mark of the spring tide on the 8 April 1837 at Poolbeg Lighthouse, Dublin.
Topographic mapping before 1956 in Northern Ireland and 1970 in the Republic of Ireland. Replaced by Belfast Lough and Malin Head (datum codes 5130-31).
Port Moresby 1996
Datum::fromSRID(Datum::EPSG_PORT_MORESBY_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1171')
BM198 (adjacent to the Port Moresby tide gauge) height of 3.02 above MSL as determined by CSIRO in 1990. Propagated through bilinear interpolation of EGM96 geoid model (transformation code 10084) reduced by offset of -1.58m.
Offset has been determined by static GNSS estimation of ellipsoid height of BM198.
Port Moresby 2008
Datum::fromSRID(Datum::EPSG_PORT_MORESBY_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1172')
BM198 (adjacent to the Port Moresby tide gauge) height of 3.02 above MSL as determined by CSIRO in 1990. Propagated through bilinear interpolation of EGM2008 geoid model (transformation code 3858 or 3859) reduced by offset of -0.93m.
Offset has been determined by static GNSS estimation of ellipsoid height of BM198 validated to a precision of 10 cm by short period tidal observations at Kerema wharf in 2010.
Porto Santo 1936
Datum::fromSRID(Datum::EPSG_PORTO_SANTO_1936)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6615')
SE Base on Porto Santo island.
Replaced by 1995 adjustment (datum code 6663). For Selvagens see Selvagem Grande (code 6616).
Porto Santo 1995
Datum::fromSRID(Datum::EPSG_PORTO_SANTO_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6663')
SE Base on Porto Santo island. Origin and orientation constrained to those of the 1936 adjustment.
Classical and GPS observations. Replaces 1936 adjustment (datum code 6615).
For Selvagens see Selvagem Grande (datum code 6616).
Posiciones Geodesicas Argentinas 1994
Datum::fromSRID(Datum::EPSG_POSICIONES_GEODESICAS_ARGENTINAS_1994)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6694')
WGS 84 coordinates at time of survey of a geodetic network of 127 points defining the National Geodetic System (Sistema Geodésico Nacional). Surveyed between February and April 1993 and between March and May 1994.
Adopted as defining the National Geodetic Reference Network from 9th May 1997. Technically, but not legally, replaced by POSGAR 98 (datum code 6190) until 15th May 2009 when legally replaced by POSGAR 2007 (datum code 1062).
Posiciones Geodesicas Argentinas 1998
Datum::fromSRID(Datum::EPSG_POSICIONES_GEODESICAS_ARGENTINAS_1998)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6190')
A geodetic network of 136 high accuracy surveyed points. Densification of SIRGAS 1995; ITRF94 at epoch 1995.4.
Replaced POSGAR 1994 (datum code 6694) for technical, but not legal, purposes. Replaced by POSGAR 2007 (datum code 1062) from May 2009.
Posiciones Geodesicas Argentinas 2007
Datum::fromSRID(Datum::EPSG_POSICIONES_GEODESICAS_ARGENTINAS_2007)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1062')
Coordinates of the geodetic network of 211 high accuracy surveyed points (178 passive and 33 continuously operating) defining the National Geodetic System (Sistema Geodésico Nacional) based on ITRF2005 at epoch 2006.632.
Adopted by order of the Director of the National Geographic Institute on 15th May 2009 as the new National Geodetic Reference Frame. Replaces POSGAR 94.
Potsdam Datum/83
Datum::fromSRID(Datum::EPSG_POTSDAM_DATUM_83)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6746')
Fundamental point: Rauenberg. Latitude: 52°27’12.021”N, longitude: 13°22’04.928”E (of Greenwich). This station was destroyed in 1910 and the station at Potsdam substituted as the fundamental point.
PD/83 is the realization of DHDN in Thuringen. It is the resultant of applying a transformation derived at 13 points on the border between East and West Germany to Pulkovo 1942/83 points in Thuringen.
Principe
Datum::fromSRID(Datum::EPSG_PRINCIPE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1046')
Fundamental point: Morro do Papagaio. Latitude: 1°36’46.87”N, longitude: 7°23’39.65”E (of Greenwich).
Provisional South American Datum 1956
Datum::fromSRID(Datum::EPSG_PROVISIONAL_SOUTH_AMERICAN_DATUM_1956)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6248')
Fundamental point: La Canoa. Latitude: 8°34’17.170”N, longitude: 63°51’34.880”W (of Greenwich).
Same origin as La Canoa datum.
Puerto Rico
Datum::fromSRID(Datum::EPSG_PUERTO_RICO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6139')
Fundamental point: Cardona Island Lighthouse. Latitude:17°57’31.40”N, longitude: 66°38’07.53”W (of Greenwich).
NADCON conversion program provides transformation from Puerto Rico Datum to NAD83 (original 1986 realization) but making the transformation appear to user as if from NAD27.
Puerto Rico Vertical Datum of 2002
Datum::fromSRID(Datum::EPSG_PUERTO_RICO_VERTICAL_DATUM_OF_2002)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1123')
Mean sea level at San Juan. Benchmark 9756371 A TIDAL = 1.334m relative to National Tidal Datum Epoch 1960-1978.
Replaces all earlier vertical datums for Puerto Rico.
Pulkovo 1942
Datum::fromSRID(Datum::EPSG_PULKOVO_1942)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6284')
Fundamental point: Pulkovo observatory. Latitude: 59°46’18.550”N, longitude: 30°19’42.090”E (of Greenwich).
Pulkovo 1942(58)
Datum::fromSRID(Datum::EPSG_PULKOVO_1942_58)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6179')
Fundamental point: Pulkovo observatory. Latitude: 59°46’18.550”N, longitude: 30°19’42.090”E (of Greenwich).
1956 international adjustment of Uniform Astro-Geodetic Network of countries of central and eastern Europe. Locally densified during 1957 and 1958.
Pulkovo 1942(83)
Datum::fromSRID(Datum::EPSG_PULKOVO_1942_83)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6178')
Fundamental point: Pulkovo observatory. Latitude: 59°46’18.550”N, longitude: 30°19’42.090”E (of Greenwich).
1983 international adjustment of Uniform Astro-Geodetic Network of countries of central and eastern Europe.
Pulkovo 1995
Datum::fromSRID(Datum::EPSG_PULKOVO_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6200')
Fundamental point: Pulkovo observatory. Latitude: 59°46’15.359”N, longitude: 30°19’28.318”E (of Greenwich).
Qatar 1948
Datum::fromSRID(Datum::EPSG_QATAR_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6286')
Fundamental point: Sokey 0 M. Latitude: 25°22’56.500”N, longitude: 50°45’41.000”E (of Greenwich).
Qatar 1974
Datum::fromSRID(Datum::EPSG_QATAR_1974)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6285')
Fundamental point: Station G3.
Qatar National Datum 1995
Datum::fromSRID(Datum::EPSG_QATAR_NATIONAL_DATUM_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6614')
Defined by transformation from WGS 84 - see coordinate operation code 1840.
Qornoq 1927
Datum::fromSRID(Datum::EPSG_QORNOQ_1927)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6194')
Fundamental point: Station 7008. Latitude: 64°31’06.27”N, longitude: 51°12’24.86”W (of Greenwich).
Raiatea SAU 2001
Datum::fromSRID(Datum::EPSG_RAIATEA_SAU_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5198')
Fundamental benchmark: RN1
Included as part of NGPF - see datum code 5195.
Ras Ghumays
Datum::fromSRID(Datum::EPSG_RAS_GHUMAYS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1146')
Mean Sea Level at Ras Ghumays 1978 and 1979.
Orthometric heights.
Rassadiran
Datum::fromSRID(Datum::EPSG_RASSADIRAN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6153')
Fundamental point: Total1. Latitude: 27°31’07.784”N, longitude: 52°36’12.741”E (of Greenwich).
Rauenberg Datum/83
Datum::fromSRID(Datum::EPSG_RAUENBERG_DATUM_83)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6745')
Fundamental point: Rauenberg. Latitude: 52°27’12.021”N, longitude: 13°22’04.928”E (of Greenwich). This station was destroyed in 1910 and the station at Potsdam substituted as the fundamental point.
RD/83 is the realization of DHDN in Saxony. It is the resultant of applying a transformation derived at 106 points throughout former East Germany to Pulkovo 1942/83 points in Saxony.
Red Geodesica Para Mineria en Chile
Datum::fromSRID(Datum::EPSG_RED_GEODESICA_PARA_MINERIA_EN_CHILE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1304')
Realized through 26 stations in the IGS (SIRGAS-CON) active reference station network in Chile.
Red Geodesica Venezolana
Datum::fromSRID(Datum::EPSG_RED_GEODESICA_VENEZOLANA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6189')
Realised by a frame of 67 stations observed in 1995 as a densification of the SIRGAS campaign and adjusted in the ITRF94 at epoch 1995.4.
Red Geodesica de Canarias 1995
Datum::fromSRID(Datum::EPSG_RED_GEODESICA_DE_CANARIAS_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1035')
ITRF93 at epoch 1994.9 at VLBI station INTA at the Canary Spatial Centre (CEC) at Maspalomas on Grand Canary.
Replaces Pico de las Nieves 1968 (PN68) and Pico de las Nieves 1984 (PN84).
Reference System de Angola 2013
Datum::fromSRID(Datum::EPSG_REFERENCE_SYSTEM_DE_ANGOLA_2013)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1220')
Network of 18 stations throughout Angola referenced to ITRF2008 @ 2010.90.
Established through daily PPP solutions in GPS week G1610.
Reseau Geodesique Francais 1993 v1
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_FRANCAIS_1993_V1)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6171')
Coincident with ETRS89 at epoch 1993.0. Derived from long-term GNSS observations at 23 points aligned to ETRF93 @ 1993.0 through fundamental points at Grasse, Toulouse and Brest. Network supplemented in 1994 and 1995 by approx. 1000 additional stations.
RGF93 v1 is a realization of ETRS89. Replaced by RGF93 v2 (datum code 1312) from 2010-06-18.
Reseau Geodesique Francais 1993 v2
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_FRANCAIS_1993_V2)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1312')
Aligned with ETRF2000 at epoch 2009.0. Based on the French GNSS permanent network (RGP) from 1998 to 2009, and the re-observation of the geodetic points of the French Reference Network (RRF) and French Base Network (RBF) from 2000 to 2011.
RGF93 v2 is a realization of ETRS89. Replaces RGF93 v1 (datum code 6171) from 2010-06-18. Replaced by RGF93 v2b (datum code 1313) from 2021-01-05.
Reseau Geodesique Francais 1993 v2b
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_FRANCAIS_1993_V2B)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1313')
Aligned with ETRF2000 at epoch 2019.0. Derived through reprocessing of the French GNSS permanent network (RGP) in IGS14.
RGF93 v2b is a realization of ETRS89. Third realization of RGF93. Replaces RGF93 v2 (datum code 1312) from 2021-01-05.
Reseau Geodesique Francais Guyane 1995
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_FRANCAIS_GUYANE_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6624')
ITRF93 at epoch 1995.0
Replaces CSG67 (datum code 6623).
Reseau Geodesique de Mayotte 2004
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_MAYOTTE_2004)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1036')
ITRF2000 at epoch 2004.0
Replaces Combani 1950 (datum code 6632) except for cadastral purposes. (Cadastre 1997 (datum code 1037) used for cadastral purposes).
Reseau Geodesique de Nouvelle Caledonie 91-93
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_NOUVELLE_CALEDONIE_91_93)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6749')
ITRF90 at epoch 1989.0.
Reseau Geodesique de Saint Pierre et Miquelon 2006
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_SAINT_PIERRE_ET_MIQUELON_2006)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1038')
ITRF2000 at epoch 2006.0
Replaces Saint Pierre et Miquelon 1950 (datum code 6638).
Reseau Geodesique de Wallis et Futuna 1996
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_WALLIS_ET_FUTUNA_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1223')
Coincident with ITRF94 at epoch 1993.00.
Reseau Geodesique de la Polynesie Francaise
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_LA_POLYNESIE_FRANCAISE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6687')
ITRF92 at epoch 1993.0. Densification by GPS of the Reference Network of French Polynesia, a coordinate set of 13 stations determined through DORIS observations.
Replaces Tahaa 54 (datum code 6629), IGN 63 Hiva Oa (6689), IGN 72 Nuku Hiva (6630), Maupiti 83 (6692), MHEFO 55 (6688), Moorea 87 (6691) and Tahiti 79 (6690).
Reseau Geodesique de la RDC 2005
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_LA_RDC_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1033')
ITRF2000 at epoch 2005.4.
Reseau Geodesique de la Reunion 1992
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DE_LA_REUNION_1992)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6627')
ITRF91 at epoch 1993.0
Replaces Piton des Neiges (code 6626).
Reseau Geodesique des Antilles Francaises 2009
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DES_ANTILLES_FRANCAISES_2009)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1073')
ITRF2005 at epoch 2009.0
Replaces RRAF91 in Martinique and Guadeloupe.
Reseau Geodesique des Terres Australes et Antarctiques Francaises 2007
Datum::fromSRID(Datum::EPSG_RESEAU_GEODESIQUE_DES_TERRES_AUSTRALES_ET_ANTARCTIQUES_FRANCAISES_2007)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1113')
ITRF2005 at epoch 2007.274
Replaces IGN 1963-64 on Amsterdam, Saint-Paul 1969 on St Paul, IGN64 on Crozet, MHM 1954 on Europa, IGN 1962 on Kerguelen, and Petrels 1972 and Perroud 1950 in Adelie Land.
Reseau National Belge 1950
Datum::fromSRID(Datum::EPSG_RESEAU_NATIONAL_BELGE_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6215')
Fundamental point: Lommel (tower). Latitude: 51°13’47.334”N, longitude: 5°18’49.483”E (of Greenwich).
Reseau National Belge 1950 (Brussels)
Datum::fromSRID(Datum::EPSG_RESEAU_NATIONAL_BELGE_1950_BRUSSELS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6809')
Fundamental point: Lommel (tower). Latitude: 51°13’47.334”N, longitude: 0°56’44.773”E (of Brussels).
Reseau National Belge 1972
Datum::fromSRID(Datum::EPSG_RESEAU_NATIONAL_BELGE_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6313')
Fundamental point: Uccle observatory. Latitude: 50°47’57.704”N, longitude: 4°21’24.983”E (of Greenwich).
Reseau de Reference des Antilles Francaises 1991
Datum::fromSRID(Datum::EPSG_RESEAU_DE_REFERENCE_DES_ANTILLES_FRANCAISES_1991)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1047')
WGS 84 coordinates of a single station determined during the 1988 Tango mission.
Replaces Fort Marigot and Sainte Anne (datum codes 6621-22) in Guadeloupe and Fort Desaix (datum code 6625) in Martinique. Replaced by Reseau Geodesique des Antilles Francaises 2009 (datum code 1073).
Rete Dinamica Nazionale 2008
Datum::fromSRID(Datum::EPSG_RETE_DINAMICA_NAZIONALE_2008)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1132')
Italian densification of ETRS89 realised through network of 99 permanent reference stations in ETRF2000@2008.0.
Adopted as official Italian reference datum 10/11/2011. Replaces IGM95 (datum code 6670).
Reunion 1947
Datum::fromSRID(Datum::EPSG_REUNION_1947)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6626')
Fundamental point: Piton des Neiges (Borne). Latitude: 21°05’13.119”S, longitude: 55°29’09.193”E (of Greenwich).
Replaced by RGR92 (datum code 6627).
Reunion 1989
Datum::fromSRID(Datum::EPSG_REUNION_1989)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5156')
Mean sea level during part of November 1949 at port of Saint-Pierre. Origin = marker AB-100 with defined elevation of 13.808m above msl.
Orthometric heights. Replaces Reunion IGN58. Value of marker AB-100 retains height from 1958 adjustment.
Reykjavik 1900
Datum::fromSRID(Datum::EPSG_REYKJAVIK_1900)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6657')
Fundamental point: Latitude: 64°08’31.88”N, longitude: 21°55’51.15”W (of Greenwich).
Rikets hojdsystem 1900
Datum::fromSRID(Datum::EPSG_RIKETS_HOJDSYSTEM_1900)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5209')
Adjustment is referenced to mean sea level at Slussen, Stockholm.
Realized through the first precise levelling network of 1886-1905. Replaced by RH70.
Rikets hojdsystem 1970
Datum::fromSRID(Datum::EPSG_RIKETS_HOJDSYSTEM_1970)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5117')
Adjustment is referenced to mean high tide at Amsterdams Peil in 1684. To account for land level movements caused by isostatic rebound, heights are reduced to epoch 1970.0 using uplift values computed from repeated levelling observations.
Realized through the second precise levelling network of 1951-1967. Uses Normal heights. Replaces RH00. Replaced in 2005 by RH2000.
Rikets hojdsystem 2000
Datum::fromSRID(Datum::EPSG_RIKETS_HOJDSYSTEM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5208')
Adjustment is referenced to mean high tide at Amsterdams Peil in 1684. To account for land level movements caused by isostatic rebound, heights are reduced to epoch 2000.0 using values computed from the RH 2000 LU (=NKG2005LU) uplift model.
Realized through the third precise levelling network of 1979-2003. Adopted in 2005, replacing RH70. Uses Normal heights.
Rikets koordinatsystem 1990
Datum::fromSRID(Datum::EPSG_RIKETS_KOORDINATSYSTEM_1990)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6124')
Replaces RT38 adjustment (datum code 6308)
Ross Sea Region Geodetic Datum 2000
Datum::fromSRID(Datum::EPSG_ROSS_SEA_REGION_GEODETIC_DATUM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6764')
Based on ITRF96 at epoch 2000.0
SCM22 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_SCM22_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1320')
Defined through the application of the SCM22 NTv2 transformation to ETRS89 as realized through OSNet v2009 CORS.
Created in 2022 to support intermediate CRS “SCM22-IRF” in the emulation of the SCM22 Snake map projection.
SIRGAS Continuously Operating Network DGF00P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF00P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1227')
Aligned to ITRF97 at epoch 2000.40. Realized by a frame of 31 continuously operating stations using GPS observations from June 1996 to February 2000. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
DGF00P01 is included in ITRF2000 as a regional densification for South America. Replaced by DGF01P01 (datum code 1228).
SIRGAS Continuously Operating Network DGF01P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF01P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1228')
Aligned to ITRF2000 at epoch 2000.00. Realized by a frame of 48 continuously operating stations using GPS observations from June 1996 to April 2001. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF00P01 (datum code 1227). Replaced by DGF01P02 (datum code 1229).
SIRGAS Continuously Operating Network DGF01P02
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF01P02)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1229')
Aligned to ITRF2000 at epoch 1998.40. Realized by a frame of 49 continuously operating stations using GPS observations from June 1996 to October 2001. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF01P01 (datum code 1228). Replaced by DGF02P01 (datum code 1230).
SIRGAS Continuously Operating Network DGF02P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF02P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1230')
Aligned to ITRF2000 at epoch 2000.00. Realized by a frame of 53 continuously operating stations using GPS observations from June 1996 to July 2002. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF01P02 (datum code 1229). Replaced by DGF04P01 (datum code 1331).
SIRGAS Continuously Operating Network DGF04P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF04P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1231')
Aligned to ITRF2000 at epoch 2003.00. Realized by a frame of 69 continuously operating stations using GPS observations from June 1996 to July 2004. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF02P01 (datum code 1230). Replaced by DGF05P01 (datum code 1232).
SIRGAS Continuously Operating Network DGF05P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF05P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1232')
Aligned to ITRF2000 at epoch 2004.00. Realized by a frame of 95 continuously operating stations using GPS observations from June 1996 to September 2005. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF04P01 (datum code 1231). Replaced by DGF06P01 (datum code 1233).
SIRGAS Continuously Operating Network DGF06P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF06P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1233')
Aligned to ITRF2000 at epoch 2004.00. Realized by a frame of 94 continuously operating stations using GPS observations from June 1996 to June 2006. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF05P01 (datum code 1232). Replaced by DGF07P01 (datum code 1234).
SIRGAS Continuously Operating Network DGF07P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF07P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1234')
Aligned to IGS05 at epoch 2004.50. Realized by a frame of 106 continuously operating stations using GPS observations in 3 periods between December 2001 and October 2007. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF06P01 (datum code 1233). Replaced by DGF08P01 (datum code 1235).
SIRGAS Continuously Operating Network DGF08P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_DGF08P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1235')
Aligned to IGS05 at epoch 2004.50. Realized by a frame of 126 continuously operating stations using GPS observations from December 2002 to March 2008. Velocity model VEMOS2003 used to propagate coordinates to the frame reference epoch.
Replaces DGF07P01 (datum code 1234). Replaced by SIR09P01 (datum code 1236).
SIRGAS Continuously Operating Network SIR09P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR09P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1236')
Aligned to IGS05 at epoch 2005.00. Realized by a frame of 128 continuously operating stations using GPS observations from January 2000 to January 2009. Velocity model VEMOS2009 used to propagate coordinates to the frame reference epoch.
Replaces DGF08P01 (datum code 1235). Replaced by SIR10P01 (datum code 1237).
SIRGAS Continuously Operating Network SIR10P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR10P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1237')
Aligned to ITRF08 at epoch 2005.00. Realized by a frame of 183 continuously operating stations using GPS observations from January 2000 to June 2010. Velocity model VEMOS2009 used to propagate coordinates to the frame reference epoch.
Replaces SIR09P01 (datum code 1236). Replaced by SIR11P01 (datum code 1238).
SIRGAS Continuously Operating Network SIR11P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR11P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1238')
Aligned to ITRF08 at epoch 2005.00. Realized by a frame of 230 continuously operating stations using GPS observations from January 2000 to April 2011. Velocity model VEMOS2009 used to propagate coordinates to the frame reference epoch.
Replaces SIR10P01 (datum code 1237). Replaced by SIR13P01 (datum code 1239). Last multi-year solution without the effects of the El Maule earthquake in February 2010.
SIRGAS Continuously Operating Network SIR13P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR13P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1239')
Aligned to IGb08 at epoch 2012.00. Realized by a frame of 108 continuously operating stations using GPS observations from April 2010 to June 2013. Velocity model VEMOS2009 used to propagate coordinates to the frame reference epoch.
Replaces SIR11P01 (datum code 1238). Replaced by SIR14P01 (datum code 1240). First multi-year solution after the El Maule earthquake of February 2010.
SIRGAS Continuously Operating Network SIR14P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR14P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1240')
Aligned to IGb08 at epoch 2013.00. Realized by a frame of 242 continuously operating stations using GNSS observations from April 2010 to July 2014. Velocity model VEMOS2009 used to propagate coordinates to the frame reference epoch.
Replaces SIR13P01 (datum code 1239). Replaced by SIR15P01 (datum code 1241).
SIRGAS Continuously Operating Network SIR15P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR15P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1241')
Aligned to IGb08 at epoch 2013.00. Realized by a frame of 303 continuously operating stations using GNSS observations from March 2010 to April 2015. Velocity model VEMOS2015 used to propagate coordinates to the frame reference epoch.
Replaces SIR14P01 (datum code 1240). Replaced by SIR17P01 (datum code 1242).
SIRGAS Continuously Operating Network SIR17P01
Datum::fromSRID(Datum::EPSG_SIRGAS_CONTINUOUSLY_OPERATING_NETWORK_SIR17P01)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1242')
Aligned to IGS14 at epoch 2015.00. Realized by a frame of 345 continuously operating stations using GNSS observations from April 2011 to January 2017. Velocity model VEMOS2017 used to propagate coordinates to the frame reference epoch.
Replaces SIR15P01 (datum code 1241).
SIRGAS-Chile realization 1 epoch 2002
Datum::fromSRID(Datum::EPSG_SIRGAS_CHILE_REALIZATION_1_EPOCH_2002)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1064')
ITRF2000 at epoch 2002.0. Densification of SIRGAS 2000 network in Chile, consisting of 650 monumented stations.
Densification of SIRGAS 2000 within Chile. Replaces PSAD56 (datum code 6248) in Chile, HITO XVIII (datum code 6254) in Chilean Tierra del Fuego and Easter Island 1967 (datum code 6719) in Easter Island. Replaced by SIRGAS-Chile 2010 (datum code 1243).
SIRGAS-Chile realization 2 epoch 2010
Datum::fromSRID(Datum::EPSG_SIRGAS_CHILE_REALIZATION_2_EPOCH_2010)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1243')
IGS08 at epoch 2010.00. Densification of SIRGAS-CON network in Chile, consisting of 120 monumented stations.
Replaces SIRGAS-Chile realization 1 epoch 2002, following significant tectonic deformation. Replaced by SIRGAS-Chile realization 3 epoch 2013.
SIRGAS-Chile realization 3 epoch 2013
Datum::fromSRID(Datum::EPSG_SIRGAS_CHILE_REALIZATION_3_EPOCH_2013)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1252')
IGb08 at epoch 2013.00. Densification of SIRGAS-CON network in Chile, consisting of 130 monumented stations.
Replaces SIRGAS-Chile realization 2 epoch 2010, following significant tectonic deformation. Replaced by SIRGAS-Chile realization 4 epoch 2016.
SIRGAS-Chile realization 4 epoch 2016
Datum::fromSRID(Datum::EPSG_SIRGAS_CHILE_REALIZATION_4_EPOCH_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1253')
IGb08 at epoch 2016.00. Densification of SIRGAS-CON network in Chile, consisting of 200 monumented stations.
Replaces SIRGAS-Chile realization 3 epoch 2013. Replaced by SIRGAS-Chile realization 5 epoch 2021 due to significant tectonic deformation.
SIRGAS-Chile realization 5 epoch 2021
Datum::fromSRID(Datum::EPSG_SIRGAS_CHILE_REALIZATION_5_EPOCH_2021)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1327')
Densification of SIRGAS-CON network in Chile, consisting of 97 stations forming the active CORS network (RGN) referenced to IGb2014 (ITRF2014) at epoch 2021.00. Passive stations used in previous realizations have been removed from this solution.
Replaces SIRGAS-Chile realization 4 epoch 2016 from August 2021 due to significant tectonic deformation. 24 additional active CORS used in this realization compared to that of 2016.
SIRGAS-ROU98
Datum::fromSRID(Datum::EPSG_SIRGAS_ROU98)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1068')
Densification of SIRGAS95 network in Uruguay, consisting of 17 passive geodetic stations and 3 continuous recording GPS stations. ITRF94 at epoch 1995.4.
Densification of SIRGAS 1995 within Uruguay. Replaces Yacare (datum code 6309) in Uruguay. Uruguay documentation clearly states use of WGS 84 reference ellipsoid.
SIRGAS_ES2007.8
Datum::fromSRID(Datum::EPSG_SIRGAS_ES2007_8)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1069')
ITRF2005 at epoch 2007.85. Densification of SIRGAS-CON network in El Salvador, consisting of 38 monumented stations.
SIRGAS-ES2007.8 is the national SIRGAS densification.
ST71 Belep
Datum::fromSRID(Datum::EPSG_ST71_BELEP)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6643')
ST84 Ile des Pins
Datum::fromSRID(Datum::EPSG_ST84_ILE_DES_PINS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6642')
Fundamental point: Pic Nga.
ST87 Ouvea
Datum::fromSRID(Datum::EPSG_ST87_OUVEA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6750')
Ouloup.
SVY21
Datum::fromSRID(Datum::EPSG_SVY21)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6757')
Fundamental point: Base 7 at Pierce Reservoir. Latitude: 1°22’02.9154”N, longitude: 103°49’31.9752”E (of Greenwich).
Replaces Kertau 1968 for cadastral purposes from August 2004.
SWEREF99
Datum::fromSRID(Datum::EPSG_SWEREF99)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6619')
Densification of ETRS89.
The solution was calculated in ITRF97 epoch 1999.5, and has subsequently been corrected to ETRS89 in accordance with guidelines given by EUREF.
Saint Pierre et Miquelon 1950
Datum::fromSRID(Datum::EPSG_SAINT_PIERRE_ET_MIQUELON_1950)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6638')
Replaced by RGSPM06 (datum code 1038).
Santa Cruz da Graciosa
Datum::fromSRID(Datum::EPSG_SANTA_CRUZ_DA_GRACIOSA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1106')
Mean Sea Level during 1938 at Santa Cruz da Graciosa.
Orthometric heights.
Santa Cruz das Flores
Datum::fromSRID(Datum::EPSG_SANTA_CRUZ_DAS_FLORES)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1108')
Mean Sea Level during 1965 at Santa Cruz das Flores.
Orthometric heights.
Santo 1965
Datum::fromSRID(Datum::EPSG_SANTO_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6730')
Datum covers all the major islands of Vanuatu in two different adjustment blocks, but practical usage is as given in the area of use.
Sao Tome
Datum::fromSRID(Datum::EPSG_SAO_TOME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1044')
Fundamental point: Fortaleza. Latitude: 0°20’49.02”N, longitude: 6°44’41.85”E (of Greenwich).
Sapper Hill 1943
Datum::fromSRID(Datum::EPSG_SAPPER_HILL_1943)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6292')
Schwarzeck
Datum::fromSRID(Datum::EPSG_SCHWARZECK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6293')
Fundamental point: Schwarzeck. Latitude: 22°45’35.820”S, longitude: 18°40’34.549”E (of Greenwich). Fixed during German South West Africa-British Bechuanaland boundary survey of 1898-1903.
Scoresbysund 1952
Datum::fromSRID(Datum::EPSG_SCORESBYSUND_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6195')
Selvagem Grande
Datum::fromSRID(Datum::EPSG_SELVAGEM_GRANDE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6616')
Serbian Reference Network 1998
Datum::fromSRID(Datum::EPSG_SERBIAN_REFERENCE_NETWORK_1998)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1034')
Densification of ETRS89 in Serbia at epoch 1998.7 based on coordinates of 6 stations in Serbia of Yugoslav Reference Frame (YUREF) 1998 campaign.
Observed 1998-2003.
Serbian Spatial Reference System 2000
Datum::fromSRID(Datum::EPSG_SERBIAN_SPATIAL_REFERENCE_SYSTEM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1214')
Densification of ETRF2000 in Serbia at epoch 2010.63.
Replaces SREF98.
Serbian Vertical Reference System 2012
Datum::fromSRID(Datum::EPSG_SERBIAN_VERTICAL_REFERENCE_SYSTEM_2012)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1216')
Mean sea level of Adriatic Sea in 1971.
Normal heights above quasi-geoid. In Serbia replaces Trieste (datum code 1050).
Serindung
Datum::fromSRID(Datum::EPSG_SERINDUNG)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6295')
Fundamental point: Ep A. Latitude: 1°06’10.60”N, longitude: 105°00’59.82”E (of Greenwich).
Sibun Gorge 1922
Datum::fromSRID(Datum::EPSG_SIBUN_GORGE_1922)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1071')
Latitude: 17º03’40.471”N, longitude: 88º37’54.687”W.
Sierra Leone 1968
Datum::fromSRID(Datum::EPSG_SIERRA_LEONE_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6175')
Fundamental point: SLX2 Astro. Latitude: 8°27’17.567”N, longitude: 12°49’40.186”W (of Greenwich).
Extension and readjustment with additional observations of 1960 network. Coordinates of 1960 stations change by less than 3 metres.
Sierra Leone Colony 1924
Datum::fromSRID(Datum::EPSG_SIERRA_LEONE_COLONY_1924)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6174')
Fundamental point: Kortright. Latitude: 8°28’44.4”N, longitude: 13°13’03.81”W (of Greenwich).
Singapore Height Datum
Datum::fromSRID(Datum::EPSG_SINGAPORE_HEIGHT_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1140')
Mean sea level determined at Victoria Dock tide gauge 1935-1937.
Orthometric heights. Network readjusted in 2009.
Sistem Referensi Geospasial Indonesia 2013
Datum::fromSRID(Datum::EPSG_SISTEM_REFERENSI_GEOSPASIAL_INDONESIA_2013)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1293')
ITRF2008 at epoch 2012.0.
Semi-dynamic datum. Geometric element of geodetic control network (JKG). Replaces DGN95 and all older datums.
Sistema Geodesico Nacional de Panama MACARIO SOLIS
Datum::fromSRID(Datum::EPSG_SISTEMA_GEODESICO_NACIONAL_DE_PANAMA_MACARIO_SOLIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1066')
ITRF2000 at epoch 2000.0. Densification of SIRGAS 2000 network in Panama, consisting of 20 GPS stations throughout the country.
Sistema de Referencia Geocentrico para America del Sur 1995
Datum::fromSRID(Datum::EPSG_SISTEMA_DE_REFERENCIA_GEOCENTRICO_PARA_AMERICA_DEL_SUR_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6170')
ITRF94 at epoch 1995.4.
Realized by a frame of 58 stations observed in 1995 and adjusted in ITRF94. Provisional NIMA adjustment reference epoch was 1995.42 but final report accepted value is 1995.40. Replaced by SIRGAS 2000.
Sistema de Referencia Geocentrico para las AmericaS 2000
Datum::fromSRID(Datum::EPSG_SISTEMA_DE_REFERENCIA_GEOCENTRICO_PARA_LAS_AMERICAS_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6674')
ITRF2000 at epoch 2000.40.
Realized by a frame of 184 stations observed in 2000 and adjusted in the ITRF2000. Includes ties to tide gauges. Replaces SIRGAS 1995 system for South America; expands SIRGAS to Central America. Name changed in 2001 for use in all of Latin America.
Sistema de Referencia Vertical Nacional 2016
Datum::fromSRID(Datum::EPSG_SISTEMA_DE_REFERENCIA_VERTICAL_NACIONAL_2016)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1260')
Mean Sea Level 1923 at Mar del Plata defined at station 71 (C = 121.64978 m^2s^-2) = 12.43m for mainland, Ushuaia station PF1N(383) (C = 38.427 m^2s^-2) = 3.915m for Tierra del Fuego. These geopotential numbers correspond with historic values.
Replaces SRVN71.
Sister Islands Geodetic Datum 1961
Datum::fromSRID(Datum::EPSG_SISTER_ISLANDS_GEODETIC_DATUM_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6726')
Fundamental point: LC5. Latitude: 19°39’46.324”N, longitude: 80°03’47.910”W (of Greenwich).
Replaced by CIGD11 (datum code 1100).
Slovenia Geodetic Datum 1996
Datum::fromSRID(Datum::EPSG_SLOVENIA_GEODETIC_DATUM_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6765')
Densification of ETRS89, based on ITRS89 at epoch 1995.55.
Slovenian Vertical System 2000
Datum::fromSRID(Datum::EPSG_SLOVENIAN_VERTICAL_SYSTEM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5177')
Reference point Ruse defined relative to mean sea level at Trieste in 1875.
Normal-orthometric heights. Promulgated through the National Vertical Network adjustment of 1999.
Slovenian Vertical System 2010
Datum::fromSRID(Datum::EPSG_SLOVENIAN_VERTICAL_SYSTEM_2010)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1215')
Mean sea level at Koper over 18.6 years, selected epoch is 2010-10-10.
Normal heights. Replaces SVS2000 from 2019-01.
Solomon 1968
Datum::fromSRID(Datum::EPSG_SOLOMON_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6718')
Fundamental point: GUX 1.
South Africa Land Levelling Datum
Datum::fromSRID(Datum::EPSG_SOUTH_AFRICA_LAND_LEVELLING_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1262')
Mean Sea Level at Cape Town harbour 1900 and 1907, referred to Datum Benchmark BM1.
Orthometric heights.
South American Datum 1969
Datum::fromSRID(Datum::EPSG_SOUTH_AMERICAN_DATUM_1969)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6618')
Fundamental point: Chua. Geodetic latitude: 19°45’41.6527”S; geodetic longitude: 48°06’04.0639”W (of Greenwich). (Astronomic coordinates: Latitude 19°45’41.34”S +/- 0.05”, longitude 48°06’07.80”W +/- 0.08”).
SAD69 uses GRS 1967 ellipsoid but with 1/f to exactly 2 decimal places. In Brazil only, replaced by SAD69(96) (datum code 1075).
South American Datum 1969(96)
Datum::fromSRID(Datum::EPSG_SOUTH_AMERICAN_DATUM_1969_96)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1075')
Fundamental point: Chua. Geodetic latitude: 19°45’41.6527”S; geodetic longitude: 48°06’04.0639”W (of Greenwich). (Astronomic coordinates: Latitude 19°45’41.34”S +/- 0.05”, longitude 48°06’07.80”W +/- 0.08”).
SAD69 uses GRS 1967 ellipsoid but with 1/f to exactly 2 decimal places. Replaces original 1969 adjustment (datum code 6618) in Brazil.
South East Island 1943
Datum::fromSRID(Datum::EPSG_SOUTH_EAST_ISLAND_1943)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1138')
Fundamental point: Challenger Astro near Port Victoria lighthouse. Latitude: 4°40’39.460”S, longitude: 55°32’00.166”E (of Greenwich).
Network readjusted in 1958-59 and extended to Bird and Denis islands in 1975.
South Georgia 1968
Datum::fromSRID(Datum::EPSG_SOUTH_GEORGIA_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6722')
Fundamental point: ISTS 061.
South Yemen
Datum::fromSRID(Datum::EPSG_SOUTH_YEMEN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6164')
Sri Lanka Datum 1999
Datum::fromSRID(Datum::EPSG_SRI_LANKA_DATUM_1999)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1053')
Fundamental point: ISM Diyatalawa. Latitude: 6°49’02.687”N, longitude: 80°57’40.880”E.
Introduced in 2000.
Sri Lanka Vertical Datum
Datum::fromSRID(Datum::EPSG_SRI_LANKA_VERTICAL_DATUM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1054')
MSL at Colombo 1884-1889.
Normal-orthometric heights, but often referred to as “orthometric”.
St. George Island
Datum::fromSRID(Datum::EPSG_ST_GEORGE_ISLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6138')
Fundamental point latitude: 56°36’11.31”N, longitude: 169°32’36.00”W (of Greenwich).
Many Alaskan islands were never on NAD27 but rather on independent datums. NADCON conversion program provides transformation from St. George Island Datum to NAD83 (original 1986 realization) - making the transformation appear to user as if from NAD27.
St. Helena Geodetic Datum 2015
Datum::fromSRID(Datum::EPSG_ST_HELENA_GEODETIC_DATUM_2015)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1174')
ITRF2008 at epoch 2015.0. ITRF2008 coordinates (15°56’33.1198”S, 5°40’02.4412”W, 453.183m ellipsoid height) of Longwood IGS CORS station STHL on 1st January 2015.
Developed by Richard Stanaway, Quickclose Pty Ltd, superseding Astro DOS 71 from 1st January 2016.
St. Helena Tritan
Datum::fromSRID(Datum::EPSG_ST_HELENA_TRITAN)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1173')
WGS 84(G1150) at epoch 2011.773. WGS 84 coordinates (15°56’33.1217”S, 5°40’02.4436”W, 453.288m ellipsoid height) of Longwood IGS CORS station STHL on 9th October 2011
St. Helena Tritan Vertical Datum 2011
Datum::fromSRID(Datum::EPSG_ST_HELENA_TRITAN_VERTICAL_DATUM_2011)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1176')
MSL defined by Longwood IGS station STHL reference level of 436.215m.
Defined by offset of -17.073m applied to St. Helena Tritan ellipsiodal height (CRS code 7880).
St. Helena Vertical Datum 2015
Datum::fromSRID(Datum::EPSG_ST_HELENA_VERTICAL_DATUM_2015)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1177')
Longwood IGS station STHL reference level of 436.312m.
Defined by SHGEOID15 geoid model (transformation code 7891) applied to SHGD2015 (CRS code 7885).
St. Kilda
Datum::fromSRID(Datum::EPSG_ST_KILDA)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5145')
Orthometric heights.
St. Kitts 1955
Datum::fromSRID(Datum::EPSG_ST_KITTS_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6605')
Fundamental point: station K12.
St. Lawrence Island
Datum::fromSRID(Datum::EPSG_ST_LAWRENCE_ISLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6136')
Many Alaskan islands were never on NAD27 but rather on independent datums. NADCON conversion program provides transformation from St. Lawrence Island Datum to NAD83 (original 1986 realization) - making the transformation appear to user as if from NAD27.
St. Lucia 1955
Datum::fromSRID(Datum::EPSG_ST_LUCIA_1955)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6606')
Fundamental point: station DCS3.
St. Marys
Datum::fromSRID(Datum::EPSG_ST_MARYS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5147')
Mean Sea Level at St. Marys 1887. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights.
St. Paul Island
Datum::fromSRID(Datum::EPSG_ST_PAUL_ISLAND)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6137')
Fundamental point latitude: 57°07’16.86”N, longitude: 170°16’24.00”W (of Greenwich).
Many Alaskan islands were never on NAD27 but rather on independent datums. NADCON conversion program provides transformation from St. Paul Island Datum to NAD83 (original 1986 realization) - making the transformation appear to user as if from NAD27.
St. Stephen (Ferro)
Datum::fromSRID(Datum::EPSG_ST_STEPHEN_FERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1189')
Fundamental point: St. Stephen’s cathedral, Vienna. Latitude: 48°12’31.54”N, longitude: 34°02’27.32”E (of Ferro).
St. Vincent 1945
Datum::fromSRID(Datum::EPSG_ST_VINCENT_1945)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6607')
Fundamental point: station V1, Fort Charlotte.
Staatlichen Nivellementnetzes 1976
Datum::fromSRID(Datum::EPSG_STAATLICHEN_NIVELLEMENTNETZES_1976)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5183')
Network adjusted in 1976. Height at reference point Hoppegarten defined as 1957 value from the UPLN adjustment. Datum at Kronstadt is mean sea level of Baltic in 1833.
Introduced in 1979. Uses Normal heights. Replaced by DHHN92.
Stewart Island 1977
Datum::fromSRID(Datum::EPSG_STEWART_ISLAND_1977)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5170')
MSL at 3-5 high and low tides at two different locations.
Stockholm 1938
Datum::fromSRID(Datum::EPSG_STOCKHOLM_1938)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6308')
Fundamental point: Stockholm observatory.
Replaced by RT90 adjustment (datum code 6124)
Stockholm 1938 (Stockholm)
Datum::fromSRID(Datum::EPSG_STOCKHOLM_1938_STOCKHOLM)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6814')
Fundamental point: Stockholm observatory
Replaced by RT90 adjustment (datum code 6124)
Stornoway
Datum::fromSRID(Datum::EPSG_STORNOWAY)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5144')
Mean Sea Level at Stornoway 1977 correlated to pre-1900. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Orthometric heights.
Sule Skerry
Datum::fromSRID(Datum::EPSG_SULE_SKERRY)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5142')
Orthometric heights.
Svalbard vertical datum 2006
Datum::fromSRID(Datum::EPSG_SVALBARD_VERTICAL_DATUM_2006)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1323')
Mean Sea Level (MSL) at Ny-Ålesund. The SVD2006 surface (arcgp-2006-sk) is the Arctic Gravity Project 2006 (arcgp-2006) surface adjusted to two benchmarks tied to the Ny-Ålesund tide gauge. arcgp-2006-sk=arcgp-2006 - 0.8986m.
Swiss Terrestrial Reference System 1995
Datum::fromSRID(Datum::EPSG_SWISS_TERRESTRIAL_REFERENCE_SYSTEM_1995)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6151')
ETRF89 at epoch 1993.0.
First realized through CHTRF95 and subsequently CHTRF98, 2004, 2010 and 2016 with an aim to re-measure every 6 years.
System of the Unified Trigonometrical Cadastral Network
Datum::fromSRID(Datum::EPSG_SYSTEM_OF_THE_UNIFIED_TRIGONOMETRICAL_CADASTRAL_NETWORK)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6156')
Modification of Austrian MGI datum, code 6312.
System of the Unified Trigonometrical Cadastral Network (Ferro)
Datum::fromSRID(Datum::EPSG_SYSTEM_OF_THE_UNIFIED_TRIGONOMETRICAL_CADASTRAL_NETWORK_FERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6818')
Modification of Austrian MGI (Ferro) datum.
System of the Unified Trigonometrical Cadastral Network [JTSK03]
Datum::fromSRID(Datum::EPSG_SYSTEM_OF_THE_UNIFIED_TRIGONOMETRICAL_CADASTRAL_NETWORK_JTSK03)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1201')
System of the Unified Trigonometrical Cadastral Network/05
Datum::fromSRID(Datum::EPSG_SYSTEM_OF_THE_UNIFIED_TRIGONOMETRICAL_CADASTRAL_NETWORK_05)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1052')
Constrained to S-JTSK but realised through readjustment in projected CRS domain. Related to ETRS89 R05 realisation through transformation code 5226.
System of the Unified Trigonometrical Cadastral Network/05 (Ferro)
Datum::fromSRID(Datum::EPSG_SYSTEM_OF_THE_UNIFIED_TRIGONOMETRICAL_CADASTRAL_NETWORK_05_FERRO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1055')
Constrained to S-JTSK but realised through readjustment in projected CRS domain.
TM65
Datum::fromSRID(Datum::EPSG_TM65)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6299')
Adjusted to best mean fit 12 stations of the OSNI 1952 primary adjustment.
Differences between OSNI 1952 and TM65 at these stations are RMS 0.25m east, 0.23m north, maximum vector 0.57m. TM65 replaced by and not to be confused with Geodetic Datum of 1965 alias 1975 Mapping Adjustment or TM75 (datum code 6300).
TPEN11 Intermediate Reference Frame
Datum::fromSRID(Datum::EPSG_TPEN11_INTERMEDIATE_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1266')
Defined through the application of the TPEN11 NTv2 transformation (code 9365) to ETRS89 as realized through OSNet v2009 CORS.
Created in 2020 to support intermediate CRS “TPEN11-IRF” in the emulation of the combined TPEN11 Snake and TPEN11ext Snake map projections.
Tahaa 54
Datum::fromSRID(Datum::EPSG_TAHAA_54)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6629')
Fundamental point: Tahaa East Base. Latitude: 16°33’20.97”S, longitude: 151°29’06.25”W (of Greenwich).
Replaced by RGPF (datum code 6687).
Tahaa SAU 2001
Datum::fromSRID(Datum::EPSG_TAHAA_SAU_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5201')
Fundamental benchmark: RN16
Included as part of NGPF - see datum code 5195.
Tahiti 52
Datum::fromSRID(Datum::EPSG_TAHITI_52)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6628')
Fundamental point: Tahiti North Base. Latitude: 17°38’10.0”S, longitude: 149°36’57.8”W (of Greenwich).
Replaced by Tahiti 79 (datum code 6690) in Tahiti and Moorea 87 (code 6691) in Moorea.
Tahiti 79
Datum::fromSRID(Datum::EPSG_TAHITI_79)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6690')
Fundamental point: Tahiti North Base. Latitude: 17°38’10.0”S, longitude: 149°36’57.8”W (of Greenwich).
Replaces Tahiti 52 (datum code 6628) in Tahiti. Replaced by RGPF (datum code 6687).
Taiwan Datum 1967
Datum::fromSRID(Datum::EPSG_TAIWAN_DATUM_1967)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1025')
Fundamental point: Hu Tzu Shan. Latitude: 23°58’32.34”N, longitude: 120°58’25.975”E (of Greenwich).
Adopted in 1980. TWD67 uses the GRS 1967 ellipsoid but with 1/f to exactly 2 decimal places.
Taiwan Datum 1997
Datum::fromSRID(Datum::EPSG_TAIWAN_DATUM_1997)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1026')
ITRF94 at epoch 1997.0
Adopted in 1998.
Taiwan Vertical Datum 2001
Datum::fromSRID(Datum::EPSG_TAIWAN_VERTICAL_DATUM_2001)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1224')
Mean Sea Level at Keelung between 1957 and 1991.
Orthometric heights.
Tananarive 1925
Datum::fromSRID(Datum::EPSG_TANANARIVE_1925)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6297')
Fundamental point: Tananarive observatory. Latitude: 18°55’02.10”S, longitude: 47°33’06.75”E (of Greenwich).
Tananarive 1925 (Paris)
Datum::fromSRID(Datum::EPSG_TANANARIVE_1925_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6810')
Fundamental point: Tananarive observatory. Latitude: 21.0191667g S, longitude: 50.23849537g E (of Paris)
Tapi Aike
Datum::fromSRID(Datum::EPSG_TAPI_AIKE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1257')
Replaced by Campo Inchauspe (code 6221) for topographic mapping, use for oil exploration and production continues.
Taranaki 1970
Datum::fromSRID(Datum::EPSG_TARANAKI_1970)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5167')
MSL at Taranaki harbour 1918-1921.
Tararu 1952
Datum::fromSRID(Datum::EPSG_TARARU_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5166')
MSL at Tararu Point 1922-1923.
Tenerife
Datum::fromSRID(Datum::EPSG_TENERIFE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1281')
Mean Sea Level at Santa Cruz de Tenerife harbour between 1960 and 1970.
Orthometric heights.
Tern Island 1961
Datum::fromSRID(Datum::EPSG_TERN_ISLAND_1961)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6707')
Fundamental point: station FRIG on tern island, station B4 on Sorol Atoll.
Two independent astronomic determinations considered to be consistent through adoption of common transformation to WGS 84 (see tfm code 15795).
Tete
Datum::fromSRID(Datum::EPSG_TETE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6127')
Fundamental point: Tete.
Timbalai 1948
Datum::fromSRID(Datum::EPSG_TIMBALAI_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6298')
Fundamental point: Station P85 at Timbalai. Latitude: 5°17’ 3.548”N, longitude: 115°10’56.409”E (of Greenwich).
In 1968, the original adjustment was densified in Sarawak and extended to Sabah.
Tokyo
Datum::fromSRID(Datum::EPSG_TOKYO)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6301')
Fundamental point: Nikon-Keido-Genten. Latitude: 35°39’17.5148”N, longitude: 139°44’40.5020”E (of Greenwich). Longitude derived in 1918.
In Japan, replaces Tokyo 1892 (code 1048) and replaced by Japanese Geodetic Datum 2000 (code 6611). In Korea used only for geodetic applications before being replaced by Korean 1985 (code 6162).
Tokyo 1892
Datum::fromSRID(Datum::EPSG_TOKYO_1892)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1048')
Fundamental point: Nikon-Keido-Genten. Latitude: 35°39’17.5148”N, longitude: 139°44’30.0970”E (of Greenwich). Longitude derived in 1892.
Extended from Japan to Korea in 1898. In Japan replaced by Tokyo 1918 (datum code 6301). In South Korea replaced by Tokyo 1918 (code 6301) only for geodetic purposes; for all other purposes replaced by Korean 1985 (code 6162).
Tonga Geodetic Datum 2005
Datum::fromSRID(Datum::EPSG_TONGA_GEODETIC_DATUM_2005)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1095')
Based on ITRF2000 at epoch 2005.0
Trieste
Datum::fromSRID(Datum::EPSG_TRIESTE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1050')
Reference point HM1(BV1)-Trieste defined relative to mean sea level at Trieste in 1875.
Normal-orthometric heights. In Croatia replaced by HVRS71 (datum code 5207).
Trinidad 1903
Datum::fromSRID(Datum::EPSG_TRINIDAD_1903)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6302')
Station 00, Harbour Master’s Flagstaff, Port of Spain.
Trinidad 1903 / Trinidad Grid coordinates (Clarke’s links): 333604.30 E, 436366.91 N (Latitude: 10°38’39.01”N, Longitude: 61°30’38.00”W of Greenwich)
Tristan 1968
Datum::fromSRID(Datum::EPSG_TRISTAN_1968)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6734')
Trucial Coast 1948
Datum::fromSRID(Datum::EPSG_TRUCIAL_COAST_1948)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6303')
Fundamental point: TC1. Latitude: 25°23’50.190”N, longitude: 55°26’43.950”E (of Greenwich).
Turkish National Reference Frame
Datum::fromSRID(Datum::EPSG_TURKISH_NATIONAL_REFERENCE_FRAME)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1057')
ITRF96 at epoch 2005.0
Tutuila Vertical Datum of 1962
Datum::fromSRID(Datum::EPSG_TUTUILA_VERTICAL_DATUM_OF_1962)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1121')
Mean sea level at Pago Pago harbor, Tutuila, over 10 years 1949-1955 and 1957-1959. Benchmark NO 2 1948 = 7.67ftUS.
Replaced by American Samoa Vertical Datum of 2002 (datum code 1125).
Ukraine 2000
Datum::fromSRID(Datum::EPSG_UKRAINE_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1077')
Orientation and scale constrained to be same as ITRF2000 at epoch 2005.0. Position is minimised deviation between reference ellipsoid and quasigeoid in territory of Ukraine.
Vanua Levu 1915
Datum::fromSRID(Datum::EPSG_VANUA_LEVU_1915)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6748')
Latitude origin was obtained astronomically at station Numuiloa = 16°23’38.36”S, longitude origin was obtained astronomically at station Suva = 178°25’35.835”E.
For topographic mapping, replaced by Fiji 1956. For other purposes, replaced by Fiji 1986.
Vientiane 1982
Datum::fromSRID(Datum::EPSG_VIENTIANE_1982)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6676')
Fundamental point: Vientiane (Nongteng) Astro Pillar. Latitude: 18°01’31.6301”N, longitude: 102°30’56.6999”E (of Greenwich).
Replaced by Lao 1993.
Vietnam 2000
Datum::fromSRID(Datum::EPSG_VIETNAM_2000)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6756')
Point N00, located in the premises of the Land Administration Research Institute, Hoang Quoc Viet Street, Hanoi.
Replaces Hanoi 1972.
Virgin Islands Vertical Datum of 2009
Datum::fromSRID(Datum::EPSG_VIRGIN_ISLANDS_VERTICAL_DATUM_OF_2009)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1124')
Mean sea level for National Tidal Datum Epoch 1983–2001 at (i) Lime Tree Bay, St. Croix (BM 9751401 M = 3.111m) , (ii) Lameshur Bay, St. John (BM 9751381 TIDAL A = 1.077m) , and (iii) Charlotte Amalie, St. Thomas (BM 9751639 F = 1.552m).
Replaces all earlier vertical datums on these islands.
Viti Levu 1912
Datum::fromSRID(Datum::EPSG_VITI_LEVU_1912)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6752')
Latitude origin was obtained astronomically at station Monavatu = 17°53’28.285”S, longitude origin was obtained astronomically at station Suva = 178°25’35.835”E.
For topographic mapping, replaced by Fiji 1956. For other purposes, replaced by Fiji 1986.
Voirol 1875
Datum::fromSRID(Datum::EPSG_VOIROL_1875)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6304')
Fundamental point: Voirol. Latitude: 36°45’07.927”N, longitude: 3°02’49.435”E of Greenwich. Uses RGS (and old IGN) value of 2°20’13.95”for Greenwich-Paris meridian difference.
Replaced by Voirol 1879 (code 6671).
Voirol 1875 (Paris)
Datum::fromSRID(Datum::EPSG_VOIROL_1875_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6811')
Fundamental point: Voirol. Latitude: 40.83578 grads N, longitude: 0.78873 grads E (of Paris).
Voirol 1879
Datum::fromSRID(Datum::EPSG_VOIROL_1879)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6671')
Fundamental point: Voirol. Latitude: 36°45’08.199”N, longitude: 3°02’49.435”E (of Greenwich). Uses RGS (and old IGN) value of 2°20’13.95”for Greenwich-Paris meridian difference.
Replaces Voirol 1875 (code 6304).
Voirol 1879 (Paris)
Datum::fromSRID(Datum::EPSG_VOIROL_1879_PARIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6821')
Fundamental point: Voirol. Latitude: 40.835864 grads N, longitude: 0.788735 grads E (of Paris).
Replaces Voirol 1875 (Paris) (code 6811).
WGS 72 Transit Broadcast Ephemeris
Datum::fromSRID(Datum::EPSG_WGS_72_TRANSIT_BROADCAST_EPHEMERIS)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6324')
Alleged datum for use with Transit broadcast ephemeris prior to 1989. Relationship to WGS 72 has changed over time.
Waitangi (Chatham Island) 1959
Datum::fromSRID(Datum::EPSG_WAITANGI_CHATHAM_ISLAND_1959)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5169')
MSL at Waitangi harbour collected in 1959.
Wake Island 1952
Datum::fromSRID(Datum::EPSG_WAKE_ISLAND_1952)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6733')
Wellington 1953
Datum::fromSRID(Datum::EPSG_WELLINGTON_1953)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5168')
MSL at Wellington harbour 1909-1946.
Wiener Null
Datum::fromSRID(Datum::EPSG_WIENER_NULL)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1267')
Historic benchmark on the Schwedenbrücke over an artificial channel of River Danube (Donaukanal) with GHA height of 156.680m.
World Geodetic System 1966
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1966)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6760')
Developed from a worldwide distribution of terrestrial and geodetic satellite observations and defined through a set of station coordinates.
A worldwide 5° × 5° mean free air gravity anomaly field provided the basic data for producing the WGS 66 gravimetric geoid. Replaced by WGS 72.
World Geodetic System 1972
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1972)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6322')
Developed from a worldwide distribution of terrestrial and geodetic satellite observations and defined through a set of station coordinates.
Used by GPS before 1987. For Transit satellite positioning see also WGS 72BE.
World Geodetic System 1984 (G1150)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G1150)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1154')
Defined through coordinates of 17 GPS tracking stations adjusted to a subset of 49 IGS stations. Observations made in February 2001. The reference epoch for ITRF2000 is 1997.0; station coordinates were transformed to 2001.0 using IERS station velocities.
Replaces World Geodetic System 1984 (G873) from 2002-01-20. Replaced by World Geodetic System 1984 (G1674) from 2012-02-08.
World Geodetic System 1984 (G1674)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G1674)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1155')
Defined through coordinates of 15 GPS tracking stations adjusted to a subset of IGS stations at epoch 2005.0. The IGS station coordinates are considered to be equivalent to ITRF2008.
Replaces World Geodetic System 1984 (G1150) from 2012-02-08. Replaced by World Geodetic System 1984 (G1762) from 2013-10-16.
World Geodetic System 1984 (G1762)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G1762)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1156')
Defined through coordinates of 19 GPS tracking stations adjusted to a subset of IGb08 stations at epoch 2005.0 using observations made in May 2013. The IGb08 coordinates are considered to be equivalent to ITRF2008.
Replaces WGS 84 (G1674) from 2013-10-16. Frame was redesignated WGS 84 (G1762’) after coordinates of 7 NGA tracking stations were changed following station moves and antenna updates 2014-08 to 2015-06. Replaced by WGS 84 (G2139) from 2021-01-03.
World Geodetic System 1984 (G2139)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G2139)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1309')
Defined through coordinates of 19 GPS tracking stations aligned with a subset of IGb14 stations at epoch 2016.0. The IGb14 station coordinates are considered to be equivalent to ITRF2014.
Replaces World Geodetic System 1984 (G1762) from 2021-01-03. Tracking station coordinate changes on 2021-03-28 when NGA implemented IGS definition of antenna phase centre offset.
World Geodetic System 1984 (G730)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G730)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1152')
Defined through coordinates of 10 GPS tracking stations adjusted to a subset of ITRF92 stations at epoch 1994.0. The reference epoch for ITRF92 is 1988.0; the ITRF92 station coordinates were transformed to 1994.0 using the NNR-NUVEL1 plate motion model.
Replaces the original Transit-derived World Geodetic System 1984 from 1994-06-29. Replaced by World Geodetic System 1984 (G873) from 1997-01-29.
World Geodetic System 1984 (G873)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_G873)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1153')
Defined through coordinates of 13 GPS tracking stations adjusted to a subset of ITRF94 stations at epoch 1997.0. The reference epoch for the adjustment was 1994.0 and the coordinates were propagated to 1997.0 using the NNR-NUVEL-1A plate motion model.
Replaces World Geodetic System 1984 (G730) from 1997-01-29. Replaced by World Geodetic System 1984 (G1150) from 2002-01-20.
World Geodetic System 1984 (Transit)
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_TRANSIT)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1166')
Defined through coordinates of 5 GPS tracking stations in the Transit doppler positioning NSWC 9Z-2 reference frame transformed to be aligned to the BIH Conventional Terrestrial Reference Frame (BTS) at epoch 1984.0.
The NSWC 9Z-2 origin shifted by -4.5 m along the Z-axis, scale changed by -0.6 x 10E-6 and the reference meridian rotated westward by 0.814” to be aligned to the BTS at epoch 1984.0. Replaced by World Geodetic System 1984 (G730) from 1994-06-29.
World Geodetic System 1984 ensemble
Datum::fromSRID(Datum::EPSG_WORLD_GEODETIC_SYSTEM_1984_ENSEMBLE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6326')
EPSG::6326 has been the then current realization. No distinction is made between the original and subsequent (G730, G873, G1150, G1674, G1762 and G2139) WGS 84 frames. Since 1997, WGS 84 has been maintained within 10cm of the then current ITRF.
Xian 1980
Datum::fromSRID(Datum::EPSG_XIAN_1980)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6610')
Xian observatory.
Yacare
Datum::fromSRID(Datum::EPSG_YACARE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6309')
Fundamental point: Yacare. Latitude: 30°35’53.68”S, longitude: 57°25’01.30”W (of Greenwich).
Yellow Sea 1956
Datum::fromSRID(Datum::EPSG_YELLOW_SEA_1956)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5104')
2 years tide readings at Qingdao.
Replaced by Yellow Sea 1985 datum.
Yellow Sea 1985
Datum::fromSRID(Datum::EPSG_YELLOW_SEA_1985)
Datum::fromSRID('urn:ogc:def:datum:EPSG::5137')
20 years tide readings at Qingdao.
Replaces Yellow Sea 1956 datum.
Yemen National Geodetic Network 1996
Datum::fromSRID(Datum::EPSG_YEMEN_NATIONAL_GEODETIC_NETWORK_1996)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6163')
Sana’a IGN reference marker.
Yoff
Datum::fromSRID(Datum::EPSG_YOFF)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6310')
Fundamental point: Yoff. Latitude: 14°44’41.62”N, longitude: 17°29’07.02”W (of Greenwich).
Zanderij
Datum::fromSRID(Datum::EPSG_ZANDERIJ)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6311')
Fk89
Datum::fromSRID(Datum::EPSG_FK89)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6753')
Replaces FD54 for cadastre.