Before coming to this forum I decided it was impossible (for me at least) but now that I have been here a while I can see it would probably be quite simple. Most of the features are denoted with swathes of colour besides the mountains. I would think that several of the talented artists who specialize in "satellite" type maps here could do this up with little problem.

In fact, I would go so far as to say there are more than a few maps on this site that are better than this one.