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

IMAP

The following keyword to the IMAP procedure is obsolete.

Keywords

DATUM

Set this keyword to a scalar string containing the name of the datum to use for the ellipsoid. The default value depends on the projection selected, but is either the Clarke 1866 ellipsoid or a sphere with a radius of 6370.997 kilometers.