Nominal area choropleth maps are choropleth maps that use nominal data, so there is no ranking system for the different categories of data. Rather, nominal data is descriptive of the spatial data that is being plotted. The map above, for example, plots the minority group with the highest percent of population for each US state. This does not communicate numerical values, but gives the reader a general idea about the makeup of state populations. It is clear that Hispanics dominate as the largest minority in the western states and blacks dominate as the largest minority in the whole eastern USA.
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