A range graded proportional circle map is a proportional circle map that uses circles in relation to the different range of data. The data is divided into interval groups and depicted as circles or sometimes other symbols. The different size circles make it easier for the viewer to read the map. The maps above is a good example of a range graded proportional circle map. Its shows the the amounts of motor vehicle deaths in different areas of california. You can see how it makes some symbols larger to show a higher amount of deaths in that area.
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