Choropleth Map

This here is a picture of a choropleth map because it not only using different color depictions but it also gives information within each area saying which state is which. Using certain indicators such as these is proof of a choropleth map. Another way to describe an choropleth map is by saying it is based on predefined areial units. You can observe from this picture the states that chose to vote for either George Bush or John Kerry in their election

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