The difference between a range graded proportional circle map to the previously discussed continuous variable proportional circle map is that this set values within a range and utilizes a legend for depict what set of values each size of a circle represent. As you can see in this map, the legend has four circle sizes with a range of value to give an overall idea of how many inhabitants of the Communes are in the Region of Zurich. This has some advantages and disadvantages. While it avoids overcrowding because number of symbols can be altered to cover value range and small symbols represent large values, the main downfall is that the symbols do not express exact values. If you wanted to know a specific number of inhabitants, you would only have a general range idea.
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