The key is that the original maps are copyrighted, and direct derivatives may fall under that, too - but the general information cannot be copyrighted (at least in the USA).

You could make a freeway map of Eriador, for example.

And see all the "unofficial" books around Minecraft or Harry Potter (or lord of the rings): https://www.amazon.com/s?k=unofficial+lord+of+the+rings

And maps "in the style" of Tolkien but covering the real world or other properties are likely entirely fine.