Ok, Basically when I made the maps I made I would find maps from star wars wiki etc or books I won them read up as much as possible regarding the planets before inserting them using novacamerons planets to match best as possible. There is usually a good match in among them, occasionally if there is limit info on a planet it would be created as a terran for balancing purposes but generally I like them to be as canon as possible, I know this sometimes causes issues for the AI and in them situations I try to work a compromise.