DEM Map

DEM maps or Digital Elevation Maps provide not only a detailed map of the land and features involved, but it allows one to make out the elevations and size of the topographic features on a 2D map. This type of map is invaluable to a business like Superstition Search and Rescue, which was one of the websites that I found during my search.
 http://en.wikipedia.org/wiki/File:Oregon_DEM_relief_map.png