I did that in Inkscape (which I am only just getting to understand how to work) because I don't have any mapping programs.

Of course, that is discounting the several RTS game mapmakers I have lying around... But those require a lot more detail. And they give me headaches.

Also, so this post isn't really pointless, here's a suggestion for future games. Reveal the map before people pick. This should make sure no one messes up with a pick that wouldn't fit in the map.

Considering it has come very close to that happening in the past with the original cavern map and air units. Luckily it was a really big cavern.