Then, overlay this layer over a coarser-grained categorization polygon layer, such as the states in the United States, symbolized with single-symbol symbology. To mimic a natural data distribution, a good approach is to symbolize a fine-grained polygon dataset, such as United States counties, with dot density symbology using a completely transparent polygon symbol. The dots are equally sized, even when multiple fields are symbolized together in a layer. Each dot represents a constant number of things, people, or other quantifiable phenomena. Instead, quantitative values for one or more fields are represented as a collection of point symbols (typically solid circles or dots) in each polygon. With dot density symbology, the data you symbolize is not classified. Draw a layer with dot density symbologyÄot density symbology is one way to represent quantities in polygons on a map.
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