Name VanDerGrinten
Alias VanDerGrinten I
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


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