You can currently create a procedural surface based on height data, but its resolution is still limited based on the resolution of the height map, and there is currently no way to map the colors of the procedural surface to a real map.
Perhaps there should be a setting to enable an almost completely procedurally generated Earth, aside from very distinct height map ares like mountains.
On the subject of Outerra, I think one of the most impressive things about is the ability to adjust atmospheric parameters in real time (I had fun making Earth look like Mars one time). I would love to have this ability in SpaceEngine.
Ah yes, I loved making a "creepy" green/dark atmospheres and making scary pictures in photoshop on it.
Here's an example: