uint16 GRidtoref(int32 ri_id)
ri_id
IN:
Raster image identifier returned by GRselect or GRcreate
Purpose
Maps a raster image identifier to a reference number.
Return value
Returns the reference number of the raster image if successful and 0 otherwise.
Description
GRidtoref returns the reference number of the raster image identified by the parameter ri_id.
This routine is commonly used for the purpose of annotating the raster image or including the raster image within a vgroup.
FORTRAN
integer function mgid2rf(ri_id)
integer ri_id