Nominal Area Choropleth maps are used when trying to convey nominal, or categorical data with colors and shading of certain areas. The example above, maps out the results from the 2008 Presidential election in which President Obama (blue) beat out Republican Mccain (red). The states that have a real dark blue color to them indicate that Obama won that area by a land side, where as the light blue such as Florida's color means that the voting was real close. This map type is real efficient and effective because it is easy to follow and allows much information to be gained in a short period of time.
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