Defines volume grid types.
| Member | Value | Description | 
|---|---|---|
| eCrdnVolumeGridTypeUnknown | -1 | Unknown or unsupported volume grid. | 
| eCrdnVolumeGridTypeCartesian | 0 | volume grid type cartesian. | 
| eCrdnVolumeGridTypeCylindrical | 1 | volume grid type Cylindrical. | 
| eCrdnVolumeGridTypeSpherical | 2 | volume grid type Spherical. | 
| eCrdnVolumeGridTypeConstrained | 3 | volume grid type Constrained. | 
| eCrdnVolumeGridTypeLatLonAlt | 4 | volume grid type LatLonAlt (Cartographic). | 
| eCrdnVolumeGridTypeBearingAlt | 5 | volume grid type BearingAlt (Surface Bearing). | 





