# EarthCoordinateSystem enum

Namespace: [Rhino.DocObjects](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.docobjects.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public enum EarthCoordinateSystem
```

ON::EarthCoordinateSystem identifies the standard used to define Earth latitude, longitude, and elevation coordinates.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Unset | 0 | ON::EarthCoordinateSystem::Unset |
| GroundLevel | 1 | ON::EarthCoordinateSystem::GroundLevel Not well defined, but latitude and longitude will be good enough for architecture sun studies. |
| MeanSeaLevel | 2 |  |
| CenterOfEarth | 3 | ON::EarthCoordinateSystem::CenterOfEarth Not well defined. The Earth's center of mass and center of volume are at different locations. |
| WGS1984 | 5 | ON::EarthCoordinateSystem::WGS1984 World Geodetic System 1984 standard. (Current GPS standard.) |
| EGM2008 | 6 | ON::EarthCoordinateSystem::EGM2008 Earth Gravitational Model 2008 standard. |