32.) Classed choropleth maps

Classed choropleth maps:

A classed choropleth map the main objective is to determine height and shading or color intensity of the bar for each map classed. This would involve creating a classed frequency legend including a frequency histogram, a frequency curve, and shading.

http://www.neighbourhood.statistics.gov.uk/HTMLDocs/images/BP%2520Maps6_tcm97-50746.jpe