Standardized Choropleth Map

Standardized Choropleth Maps are areal averaged based on an areal unit. An areal unit can be a county, country, or standardized area. There are two main ways to areal average: by Density or by Percentage.

The map shown is a Standardized Choropleth Map of "Salve Population Density." It is standardized because it is areally average based on a determined areal unit. The areal unit in this map is modern county limits. Many United States maps are standardized by counties.

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