Just make a black ceiling, sprinkle it with white dots, and then hang the space station from it by a thread.

Yeah, nothings, I had to go through and manually carve out proper craters... didn't spend too much time doing it either. ;-) wikku has a good point for a possible solution.
And @DarkMessiah, your space station would probably work on pyspades server (when it gets fixed if it isn't as of this writing) because pyspades still supports floating blocks.

too bad the fog is gray
its in fucking space and should be black
plus anti-gravity high jumps are obviously necessary in a moon map

delete darker colors from heightmap and will be ok

It's a cool idea, and I'm glad to see you made the try. Sadly, the image shows lighting which is related to the slope, rather than the height, so it doesn't really create very crater-y terrain (and the lighting is pretty mismatched). I think you can get lunar heightfields though, and martian ones, but the nasa server i'm turning up on google seems broken.

Here's some: http://vterrain.org/BT/index.html (try Ratcliff's fake moon as a good start -- he was a developer on Planetside), but sadly they're not in the right format.

Awesome idea! I actually started building a space station like thing (obviously it can't hover because ingame it would all just fall apart lol) and it would go perfectly with this map! :D

Well, this is more of a work-in-progress in some ways, but I figured I might just put it out there. Ladies & germs, I present to you... Lunar Warfare!

Screenshots: http://imgur.com/a/GfkaJ

Download: http://www.mediafire.com/?6whguqc61cui37s

The work-in-progress aspect comes from the lack of low-gravity settings in this game and the fact that there is fog on the Moon. Removing the fog and maybe having a skybox and low-gravity would make this map pretty hilarious. At this point it's a nightmare to chat in... It'd be great if we could make some sort of AstroDeuce or Space Marine for it. I thought for a while about making the lunar lander into a KV6 to replace the tent/CP. Not sure what to change the intel into... any thoughts?

I primarily did this as a test of a heightmap creation technique using gaussian blur on the original image. You can take a look at the basic map and heightmap here if you're curious. http://imgur.com/a/r2QMG

Anyhoo... play at your own risk. ;-)