User:Clarknova/sandbox/Surface map

A 3D surface map of Mt. St. Helens with a 2D contour map above for comparison.

In mathematics, geology, and cartography, a Surface Map is a 2D perspective representation of 3D surface.

Surface maps usually represent real-world objects such as landforms or the surfaces of objects. They can, however, serve as an abstraction where in the third, or even all of the dimensions correspond to non-spatial data values. In this capacity they act more as graphs than maps.