Hypsometric Map

 

http://en.wikipedia.org/wiki/Cartographic_relief_depiction 

Hypsometric Maps are a type of topographic map. Instead of using contour lines to show elevation, hypsometric maps use color and shading to display elevation. While some maps may use gradient color schemes, other may use classification blocks. These maps are used a lot for world maps and globes. They are an easy way to show the relief of the land and are often easily accessible.