How to make a 3D interactive map

Hey Guys, I am making a asymmetric game where one player has a map of the level. How do I go about making a 3d interactive map that also isn't very resource heavy. If it was a 2d map then I could just take a screenshot of the level with an orthographic camera from above and just match the UVs to to World Coordinates (which I don't know how to do).