I can only think of just loading it in a program that can save it as a file the game can use for maps.. and then do the white dots needed for the game to recognize provinces and bright red lines to mark borders...
I'd more work than you'd think though
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Want a blend of
fantasy and
sci-fi? Try the total conversion
Dominions 3000 mod with a new and fully modded solar system map.
Dragons wanted? Try the
Dragons, Magic Incarnate nation.
New and different undead nation? Try
Souls of Shiar. Including new powerfull holy magic.
In for a whole new sort of game? Then try my scenario map
Gang Wars.