Cartogram

Cartogram for the U.S. presidential election, 2004.

A cartogram is a diagram which uses the form of a map to present numeric information while maintaining some degree of geographic accuracy.

For example, a population cartogram illustrates the relative sizes of the populations of the countries of the world by scaling the area of each country in proportion to its population; the shape and relative location of each country is retained to as large an extent as possible, but inevitably a large amount of distortion results.

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External links

Cartogram Central (http://www.ncgia.ucsb.edu/projects/Cartogram_Central/)
A population cartogram (http://www.odt.org/Pictures/poplcart.jpg)
Multiple cartograms showing the results of the 2004 US Presidential Election (http://the-raw-prawn.blogspot.com/2004/11/alternate-views-of-electoral-map.html)
Tools to draw cartograms (http://ideas.web.cse.unsw.edu.au/index.php?module=articles&func=display&ptid=1&aid=401)

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