Alias for CONTOUR/FILL , color-filled contour plot. All qualifiers and restrictions are defined in the documentation for CONTOUR/FILL.
Example:
yes? FILL/PAL=land_sea etopo60
is equivalent to
yes? CONTOUR/FILL/PAL=land_sea etopo60
In a curvilinear coordinate system (map projections)
yes? FILL[/qualifiers] expression, xcoords, ycoords