VDG

 Projection     : Van der Grinten
 General class  : miscellaneous
 Characteristics: neither equal-area nor conformal
 Earth model    : sphere

Defining the MAPUNITS:

 MapUnits "vdg"      ! Standard name
 MapUnits "vdg e19"  ! Standard name and ellipsoid

Other parameters:

 TrueOriginLongitude "central_meridian"  ! Required, for True origin
 FalseEasting        "false_easting"     ! Optional, default is zero
 FalseNorthing       "false_northing"    ! Optional, default is zero