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2012. Wyoming Geographic Information Sciences Center. This polygon shapefile contains the 4th level, 8-digit hydrologic unit code (HUC) sub-basin boundaries for California. A hydrologic unit is a drain... Wyoming Geographic Information Sciences Center.
2012. Department of Conservation & Development, Contra Costa County. This dataset represents the Supervisor Disricts within Contra Costa, California. Latest data revision occurred in November 2012; Data was mapped an...
2012. Amador County (Calif.). Amador County Supervisorial District Boundaries based on the 2010 Census.
2012. Napa County Geographic Information Systems . This layer is compoised of polygons depicting the Supervisorial Disricts a provided by the Napa County elections department .
2012. Department of Elections, Francisco County, California. . Supervisorial Districts, developed by Redistricting Task Force, submitted on 18 April 2012. Note: for mapping and analysis purposes, the non-land a...
2012. Alameda County Registrar of Voters . AC Transit District, within the extent of Alameda County; boundaries have been updated to show changes for 2011-2012 redistricting. .
2012. I.M. Systems Group. Unexploded ordnance (or UXOs/UXBs, sometimes identified as UO) are explosive weapons (bombs, bullets, shells, grenades, land mines, naval mines, et... United States. National Oceanic and Atmospheric Administration and Coastal Services Center (U.S.).
2010, 2011, 2012, and 2013. U.S. Census Bureau. Geography Division and Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the 2010 Census urban areas in the United States. An urban area comprises a densely settled core of census tracts... Environmental Systems Research Institute (Redlands, Calif.).
2012. National Atlas of the United States and Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the water feature areas (for example, glaciers, lakes, reservoirs, and swamps) of the United States at 1:1,000,00... Environmental Systems Research Institute (Redlands, Calif.).
2012. California. Department of Water Resources and County of San Mateo Information Services Department. This polygon shapefile represents a land use survey of San Mateo County conducted by the California Department of Water Resources, North Central Re... County of San Mateo Information Services Department.