This map I quite like, it has a Mars-like feel too it (though obviously it isn't set on Mars, but rather in a Desert). Regardless, a fairly decent map.
Grand Canyon 1.0
Description: I have made this as my first actualy real world map for supreme commander. it is detailed, which I got the height map from the USGS website
Installation: Just Place it on youe Maps folder in the supcom dir.
WARNING. No one will use this map for profit. using my stuff for profit, may get your prosecuted.