An unstandardized choropleth map is similar to other types of choropleth maps except that the class key used in unstandardized choropleth map uses assymetrically specific numbers that fit with the map area represented. The unstandardized choropleth map allows for much more accuracy and pragmatism as well as allows the cartographer more freedom to narrow the ranges to fit their purpose. The image shown above is an example of an unstandardized choropleth map where you can witness the cartographer using specific ranges unique to Sao Paulo's total population and population density in 1991.
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