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Resource Source:U.S. Census Bureau
"Thematic maps are data maps of a specific subject or for a specific purpose. Statistical thematic maps include a variety of different map types such as choropleth or shaded maps, dot maps, proportional symbol maps, and isarithmic maps. Special purpose maps generally concentrate on a single theme, such as the Centers of the Population Centers of the U.S. between 1790 and 2000." (From publisher's website)Links:
Maps hosted by Census Bureau website (Source: U.S. Census Bureau)
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