Proportional Circle Map

http://www.cscs.umich.edu/~crshalizi/slothblog/2006/
Above is an extreme example of a proportional circle map; this is also an example of a cartogram. This map is demonstrating the Red-Blue political divide in the US. It is broken down county by county and it is area proportional. The color demonstrates how the counties voted for either party (red/Republican, blue/Democrat) during the 2000 Presidential election. The intensity of the color signifies the degree to which the counties voted Democrat or Republican.