Nominal Area Choropleth Map

Nominal Area Choropleth Maps use qualitative classification with no implicit ordering. Nominal is one level of data measurement in maps; Ordinal, interval, and ratio are the other forms. Qualitative is a none numerical grouping system and information is grouped according to category.

The map Shown is a Nominal Area Choropleth Map of "Largest Ancestry, 2000." It gives no indication of value but simply states the dominate Ancestry of each county.

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