Hypsometric map

http://www.reliefshading.com/colors/hypsometric.html

A hysometric map uses different colors, or shading to show change in elevation. Each different contour line is filled with a color and thats how hysometric maps are created. This is a hysometric map of the country France, you can see the border of Spain below, and the changing of color from the coast inland to the Alps. Much like a contour map but uses color so it can be more easily understood.