http://www.payvand.com/news/08/mar/1294.html
A Nominal Area Choropleth Map is a map that portrays qualitative, categorical areal data. There is no implicit ordering, rather, data is classified into groups. Nominal Area Choropleths are generally of the more basic variety, that is, they do not show elevation or a thrid demension, but relay numerical information about the area being mapped. Above is an example of a Nominal Area Choropleth Map displaying the various ethnic minorities that persist throughout Iran. This map is useful in the assesment of the situation of human rights as these ethnic and religious groups continue to control certain areas of Iran. This is also helpful in the assement of what groups 'rule' what land, and what resources are in that region of Iran.
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