2014. United States. Bureau of Transportation Statistics. This polygon shapefile contains United States county boundaries with political limits extracted from the U.S. Census Bureau's MAF/TIGER Database (M... United States. Bureau of Transportation Statistics.
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2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States administrative county boundaries extracted from the U.S. Census Bureau's MAF/TIGER Database (MTDB). T... United States. Bureau of Transportation Statistics.
2010. United States. Bureau of the Census and United States. National Ocean Service. This polygon shapefile represents population and race by county for coastal regions in the Northeastern United States for 2010. This data product w... Northeast Ocean Data.
2010. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts the nine counties of the San Francisco Bay Area Region in California. This data was derived from the United States C... Bay Area Open Space Council.