Hypsometric Maps

http://acartographicalworld.blogspot.com/2010/12/hypsometric-map.html

Hypsometeric Map

Hypsometric maps are a type of topographic map that uses colors instead of contour lines.  These different colors are known as hypsometric tints, and they are usually used in a scheme of graduated colors.  As seen in the map above, the scales colors represent the elevation of the earths surface.