When the symbology is based on an expression, this sorting does not occur, and some smaller symbols might be obscured by larger ones. When proportional symbology is based on a single field, the symbols are drawn in a sorted order, where the larger features draw first and the smaller features draw above. Proportional symbols can be based on an attribute field in the dataset, or you can write an Arcade expression on which to generate numeric values to symbolize. This animated map uses proportional symbols to show the fluctuation of precipitation in Mexico. For reference, you can specify a uniform background symbol for the polygons that draw below the points. When applied to polygon features, a proportionally sized point symbol draws at the center of the polygon. When applied to point or line symbols, the feature's size is modified directly. Proportional symbols can be defined for point, line, or polygon feature layers.
#Logic pro 10.4 expression maps series
But where graduated symbols distribute features into distinct classes, proportional symbols represent quantitative values as a series of unclassed symbols, sized according to each specific value. Proportional symbology is similar to graduated symbols symbology in that both draw symbols sized relative to the magnitude of a feature attribute. Proportional symbology is used to show relative differences in quantities among features. Share a layer with proportional symbols.Vary proportional symbology by transparency, rotation, or color.Draw a layer with relative- or actual-sized proportional symbols.
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