NHGISNational Historical Geographic Information System (University of Minnesota)
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NHGIS (National Historical Geographic Information System Database: Version 11.
50] nighttime noise; (B) population density; (C) racial residential segregation (urban CBSAs only); (D) non-Hispanic, nonwhite race/ethnicity; (E) poverty; and (F) <high school education (deciles) at the block group-level in the contiguous United States estimated from 2006-2010 American Community Survey data; 2010 shapefiles used to generate these maps downloaded from the NHGIS site: http://www.