Illinois State University offers up an additional source for anyone who is still somewhat confused on classed choropleth maps and the classification techniques used for them. First of all take a look at the legend. This map has four intervals. A choropleth map can have different intervals and the number used can change the way the map looks. Also, look at the way the interval is broken up. There are four classification techniques: Equal steps, Quantiles, Natural Breaks, and Minimum Variance.
Wednesday, June 11, 2008
Classed Choropleth Map
Illinois State University offers up an additional source for anyone who is still somewhat confused on classed choropleth maps and the classification techniques used for them. First of all take a look at the legend. This map has four intervals. A choropleth map can have different intervals and the number used can change the way the map looks. Also, look at the way the interval is broken up. There are four classification techniques: Equal steps, Quantiles, Natural Breaks, and Minimum Variance.
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