# Vertical

Tip

You can access the list of supported coordinate systems at runtime using `Vertical::getSupportedSRIDs()`

or
`Vertical::getSupportedSRIDsWithHelp()`

## Axis: depth (D). Orientation: down. Units: foot.

```
Vertical::fromSRID(Vertical::EPSG_AXIS_DEPTH_D_ORIENTATION_DOWN_UOM_FT)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::6495')
```

Used in vertical coordinate reference systems.

## Axis: depth (D). Orientation: down. Units: foot (US).

```
Vertical::fromSRID(Vertical::EPSG_AXIS_DEPTH_D_ORIENTATION_DOWN_UOM_FTUS)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::1043')
```

Used in US vertical coordinate reference systems.

## Axis: depth (D). Orientation: down. Units: metre

```
Vertical::fromSRID(Vertical::EPSG_AXIS_DEPTH_D_ORIENTATION_DOWN_UOM_M)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::6498')
```

Used in vertical coordinate reference systems.

## Axis: height (H). Orientation: up. Units: British foot (1936).

```
Vertical::fromSRID(Vertical::EPSG_AXIS_HEIGHT_H_ORIENTATION_UP_UOM_FT_BR36)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::6496')
```

Used in vertical coordinate reference systems.

## Axis: height (H). Orientation: up. Units: foot.

```
Vertical::fromSRID(Vertical::EPSG_AXIS_HEIGHT_H_ORIENTATION_UP_UOM_FT)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::1030')
```

Used in vertical coordinate reference systems.

## Axis: height (H). Orientation: up. Units: foot (US).

```
Vertical::fromSRID(Vertical::EPSG_AXIS_HEIGHT_H_ORIENTATION_UP_UOM_FTUS)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::6497')
```

Used in vertical coordinate reference systems.

## Axis: height (H). Orientation: up. Units: metre

```
Vertical::fromSRID(Vertical::EPSG_AXIS_HEIGHT_H_ORIENTATION_UP_UOM_M)
Vertical::fromSRID('urn:ogc:def:cs:EPSG::6499')
```

Used in vertical coordinate reference systems.