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.
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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.
2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, and 2016. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for American Samoa. The USGS Protected Areas Database of the United Stat... Gap Analysis Program (U.S.).
1971. Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... 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 nitrogen di... United States. Bureau of Transportation Statistics.