Well, as you're not in a huge hurry–I do have leathercrafting tools, just not in my home here, but in my mom's house. I have never attempted to craft a leather map though. It would definitely be easier and cheaper to have a canvas map produced than a carved leather one. There is also the possibility of having a black and white map produced that could then be laser etched into leather or wood or metal. My portfolio of digital art fantasy maps is available for your perusal.