This section is for future development TBD. Possible additional GeoKeys for Revision 2.0: PerspectHeightGeoKey (General Vertical Nearsided Perspective) SOMInclinAngleGeoKey (SOM) SOMAscendLongGeoKey (SOM) SOMRevPeriodGeoKey (SOM) SOMEndOfPathGeoKey (SOM) ? is this needed ? SHORT SOMRatioGeoKey (SOM) SOMPathNumGeoKey (SOM) SHORT SOMSatelliteNumGeoKey (SOM) SHORT OEAShapeMGeoKey (Oblated Equal Area) OEAShapeNGeoKey (Oblated Equal Area) OEARotationAngleGeoKey (Oblated Equal Area) Other items for consideration: o Digital Elevation Model information, such as Vertical Datums, Sounding Datums. o Accuracy Keys for linear, circular, and spherical errors, etc.
o Source information, such as details of an original coordinate system and of transformations between it and the coordinate system in which data is being exchanged.