The features described in this topic are obsolete
and should not be used in new IDL code.

MAP_PROJ_INIT

The following keyword to the MAP_PROJ_INIT function is obsolete.

Keywords

DATUM

Set this keyword to either an integer code or a scalar string containing the name of the datum to use for the ellipsoid. The default value depends upon the projection selected, but is either the Clarke 1866 ellipsoid (datum 0), or a sphere of radius 6370.997 km (datum 19).