# VanDerGrinten

Name | VanDerGrinten
Alias | VanDerGrinten I
EPSG Code |
GeoTIFF Code | CT_VanDerGrinten (25)
OGC WKT Name | VanDerGrinten
Supported By | GeoTIFF, PROJ.4, OGC WKT

### Projection Parameters

Name | EPSG # | GeoTIFF ID | OGC WKT | Units | Notes
--- | --- | --- | --- | --- | ---
Longitude of projection center | 2 | ProjCenterLong | central_meridian | Angular |
False Easting | 6 | FalseEasting | false_easting | Linear |
False Northing | 7 | FalseNorthing | false_northing | Linear |

### Notes

Intergraph files use NatOriginLat/Long instead of CenterLat/Long. Earlier discussions of VanDerGrinten don't include a scale, and CenterLat, but Intergraph's files do. I have omitted them from the above list, but I imagine they may be added back.

Note that VanDerGrinten is a spherical projection. Care must be taken translating between systems that derive a spherical radius approximation from the ellipsoid by different mechanisms.

### PROJ.4 Organization

      +proj=vandg +lon_0=Longitude at projection center
                  +x_0=False Easting
                  +y_0=False Northing