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2001. Geological Survey (U.S.). This raster layer is a georeferenced image containing impervious surface data for the conterminous United States. Data are in an Albers Equal-Area ... Geological Survey (U.S.).
1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, and 2008. Environmental Systems Research Institute (Redlands, Calif.) and United States. Bureau of Transportation Statistics. This line shapefile represents rural and urban interstate highways. U.S. National Transportation Atlas Interstate Highways is part of the National ... Environmental Systems Research Institute (Redlands, Calif.).