2013. Rawson, Peg and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States congressional district boundaries for 2013-2015. Congressional Districts are the 435 areas from which... United States. Bureau of Transportation Statistics.
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2013. Oak Ridge National Laboratory. This raster dataset is a subdirectory containing the ArcGIS grid (world_admin1) of the countries/sub-countries. These are the standard Level 1 Admi... Oak Ridge National Laboratory.
2013. Oak Ridge National Laboratory. This raster dataset is a grid of world countries. These are the standard country boundaries. Also included is a DBF (countries.dbf) giving the coun... Oak Ridge National Laboratory.
2013. DeLorme Publishing Company and Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the boundaries for the first-level administrative divisions of the world at 1:10,000,000 scale. This layer is par... Environmental Systems Research Institute (Redlands, Calif.).