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.).
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2011. United States. Bureau of Transportation Statistics. This polygon shapefile depicts service wide boundary set for display and general analysis purposes. This layer is part of the 2014 National Transpo... United States. Bureau of Transportation Statistics.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at crude resolution. Lake islands, or inland islands, are landmasses ... United States. National Geospatial-Intelligence Agency.
2012. United States. Department of State. Office of the Geographer. This line shapefile contains country boundaries for Africa and American continents. Large Scale International Boundaries (LSIB) are created and mai... United States. Department of State. Humanitarian Information Unit.
2001. United States. Minerals Management Service. This polygon shapefile shows the official protraction diagram (OPD) and leasing map boundaries for the United States, covering areas of the Outer C... Geological Survey (U.S.).
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts major playas, salt pans and intermittent lakes worldwide. Care must be taken not to have playas extend beyond flat a... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts major playas, salt pans and intermittent lakes worldwide. Care must be taken not to have playas extend beyond flat a... North American Cartographic Information Society.
2011. United States. Office of the Deputy Under Secretary of Defense (Installations and Environment) and United States. Bureau of Transportation Statistics. This polygon shapefile depicts sites that were selected from the 2010 Base Structure Report (BSR), a summary of the DoD Real Property Inventory (RP... United States. Bureau of Transportation Statistics.
Hijmans, Robert J. This polygon shapefile contains the boundary of United States (adm0). This layer is part of the Global Administrative Areas 2015 (v2.8) dataset. University of California, Berkeley. Museum of Vertebrate Zoology and International Rice Research Institute.
Hijmans, Robert J. This polygon shapefile contains the first-level administrative divisions of United States (adm1). Level 1 divisions include states and federal dist... University of California, Berkeley. Museum of Vertebrate Zoology and International Rice Research Institute.