# BasepointZero 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) · Since v5.0 · Obsolete v8.6

```cs
[EditorBrowsable(EditorBrowsableState.Never)]
public enum BasepointZero
```

> **Obsolete:** Please use EarthCoordinateSystem

Specifies enumerated constants used to indicate the zero level convention relating to a location on Earth.

This is used in conjunction with the [EarthAnchorPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.docobjects.earthanchorpoint.md) class.

## Values

| Name | Value | Description |
| --- | --- | --- |
| GroundLevel | 0 | The ground level is the convention for 0. |
| MeanSeaLevel | 1 | The mean sea level is the convention for 0. |
| CenterOfEarth | 2 | The center of the planet is the convention for 0. |