psscale should be able to accept either map coordinates or plot coordinates for the anchor point
|Target version:||Candidate for next minor release|
While pslegend takes an anchor point either in map (-D) or plot (-Dx) coordinates, psscale only accepts plot coordinates. It would be helpful to allow psscale to do either as well. One possible implementation would be to allow for modifier +g to indicate that the given coordinates are geographic and +c to indicate they are Cartesian (plot) coordinates. With such modifier we could honor the backwards compatible pslegend -Dx and allow psscale to take geographic locations.