Well first of remember that you have to ask for permission for making anything with other peoples copyrights so you don't end up getting dragged to court. Since your project is non-profit you might be able to get off without paying anything (if he is a nice guy and his agent, publishers, lawyers, other licensholders, wife and dog also are *lol*).
Once the legal stuff is out of the way - the you can start mapping - or asking people to start mapping for you.

Good luck with your project