Nominal Area Choropleth Map

Source - http://www.veiled-chameleon.com/weblog/archives/2004_07.html

Here we have a Nominal Area Choropleth map that depicts the 2004 election with showing swing, republican, and democrat states in there respected. Nominal area choropleth maps compare variables over a given area to map it easier to compare the them. The pattern above is that most states are republican rather than democrat but also that most states are in fact a swing which they can go either democrat or republican.