1975. United States. Bureau of Transportation Statistics. This point shapefile contains information about vehicle accident characteristics and environmental conditions at the time of the crash, between 197... United States. Bureau of Transportation Statistics.
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2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).
2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile represents locations of nonferrous metal mines in the United States. The data represent commodities covered by the Minerals In... National Atlas of the United States.
1971. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1992. Geological Survey (U.S.). This raster layer is a georeferenced image of 1992 land cover for the conterminous United States, at a resolution of 200 meters. The map layer was ... Geological Survey (U.S.).
1987, 1988, 1989, 1990, 1991, 1992, and 1993. National Atlas of the United States. The Satellite View of the Conterminous United States, with Shaded Relief map layer is a 200-meter-resolution simulated-natural-color image of the U... National Atlas of the United States.
1992. Wade, Tim. This raster image is a 270-meter resolution grid map of the conterminous United States in GeoTIFF format, created from National Land Cover Data (NL... National Atlas of the United States.
2001. Godt, Jonathan W. This polygon shapefile shows point locations of costly individual landslide events in the 50 United States and Puerto Rico. Landslide locations wer... National Atlas of the United States.
2006. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.