Univariate Choropleth Map

This picture of a Univariate Choropleth map shows the harvested acres of corn for grain in 2002. We can see that many areas in the north have between 100,000-149,000 acres and with some areas having over 150,000 acres. This would be considered to be a univariate choropleth map because it is a single data set displayed over one given areas.

http://gis3015mapblog.blogspot.com/2010/12/univariate-choropleth-map.html