Ok, as a visually inept person, I'm almost literally incapable of producing large-scale maps, but I need one for my RL game, and so I come to you, artsy playgrounders, for help.

What I've got so far:
This map
A circular patch of scorched earth in a temperate-tropical climate(patch is roughly 500 miles across)

What I need:
Map of a 600-1000 mile wide region showing a more detailed topography. Scale of the inversed earth has not been decided, but I'd prefer to keep it similar to the our earth.

I'm currently lurking the in the IRC