Choropleth Map

http://www.thefunctionalart.com/2012/11/when-choropleth-maps-deceive.html
Choropleth maps are most noticebly used in elections, and use graded differences in shading, color, or the placing of symbols inside defined areas on the map in order to indicate the average values of some property or quantity in those areas.I used this choropleth map because it was the first time I really looked at, and made sense of the geographic locations of Democrats and Republicans, during the last Presidential run.