Quote Originally Posted by Hai-Etlik View Post
There are ways to generate a set of contours from a Digital Elevation Model (DEM), but that goes beyond normal graphics software into the realm of specialized geographic software, both to build a DEM, and to produce contours from it.
Take a look at Wilbur. If you have a heightfeild of the map you wish to draw, Wildur provides the abiliity to generate contour lines for that heightfield map.