As the election year is ramping up, now is a good time to introduce electoral geography (since there are millions of dollars been spent of this type of analysis). Displayed is the county map of the 2008 presidential election (McCain=red, Obama=blue). What are the geographic and demographic characteristics of the 2008 voting base of both the Republican and Democratic parties? This is also a great map to discuss how to interpret maps--how could this map be misleading? What additional information is needed to contextualize this data? Follow the link for additional maps that provide attempt to visualize that context.
Via Seth Dixon