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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 sulfur diox... United States. Bureau of Transportation Statistics.
1978. 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 sulfur diox... United States. Bureau of Transportation Statistics.
2010. 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 sulfur diox... United States. Bureau of Transportation Statistics.
2012. United States. Bureau of Transportation Statistics and Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile depicts physical information on commercial facilities at the principal United States coastal, Great Lakes and inland ports. Th... United States. Bureau of Transportation Statistics.
2004. United States. Bureau of Transportation Statistics and United States. Federal Transit Administration. This polyline shapefile depicts the Fixed-Guideway Transit Network, a network database of the nation's fixed-guideway transit systems. Fixed-Guidew... United States. Bureau of Transportation Statistics.
2013. United States. Bureau of Transportation Statistics and United States. Federal Transit Administration. This point shapefile depicts railway stations within the Fixed-Guideway Transit Network, a network database of the nation's fixed-guideway transit ... United States. Bureau of Transportation Statistics.
Hijmans, Robert J. This polygon shapefile contains the second-level administrative divisions of American Samoa (adm2). Level 2 divisions include counties. This layer ... University of California, Berkeley. Museum of Vertebrate Zoology and International Rice Research Institute.
2012. United States. Bureau of Transportation Statistics and United States. Bureau of the Census. Geography Division. This polygon shapefile depicts state boundaries extending into the ocean with detailed shorelines, including all 50 states plus Puerto Rico, Washin... United States. Bureau of Transportation Statistics.
2012. United States. Bureau of Transportation Statistics and United States. Bureau of the Census. Geography Division. This polygon shapefile depicts state boundaries with politicial limit extending into the ocean with detailed shorelines, including all 50 states pl... United States. Bureau of Transportation Statistics.
Hijmans, Robert J. This polygon shapefile contains the third-level administrative divisions of American Samoa (adm3). Level 3 divisions include villages. This layer i... University of California, Berkeley. Museum of Vertebrate Zoology and International Rice Research Institute.