http://personal.uncc.edu/lagaro/cwg/color/Choropleth-5Good.gif
In a classed choropleth map the data is separated into groups. It is broken down into a scale and the use of colored intervals. There are usually 4-7 data sets that the information is divided into. In the map above shows the amount of money spent per student in the Public Education System in North Carolina in 1994-1995.
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