Univariate Choropleth Map

http://www.colocarto.com/custom-thematic-maps.html

Univariate Choropleth maps a more simple type of choropleth map.  These maps display only one specific variable.  Although simple, the univariate choropleth map keeps up all of the standards to be considered a choropleth map.  The map provided uses only one variable which is the median household income for 2008.  The different shades portrayed show the different amounts of income.  By showing this one specific piece of information, this map could be considered an univariate choropleth map.