2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).
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2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. This layer was derived from t... Geological Survey (U.S.).
2002. Geological Survey (U.S.). This raster layer is a georeferenced grid map image of land cover characteristics for North America, excluding Hawaii, and including the Caribbean ... Geological Survey (U.S.).
1899. Geological Survey (U.S.). At head of map "Report, Public resolution No. 25, 55th Congress, 3d session."; Relief shown by contours and spot heights.; Survey in 1898.; "Map 10... U.S. Geological Survey (Washington, D.C).
1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
2005. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
2000. Geological Survey (U.S.). This polygon shapefile portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
2002. United States. Forest Service and Geological Survey (U.S.). This raster layer portrays general forest cover types for the United States in GeoTIFF format. Data were derived from Advanced Very High Resolution... National Atlas of the United States.
1999. Geological Survey (U.S.). This line shapefile portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the i... Geological Survey (U.S.).
10. Map of Alaska
1927. Geological Survey (U.S.). Alternate title: Alaska, map A.; Relief shown by spot heights. 42 x 60 centimeters Scale 1:5,000,000 approximately 80 miles to 1 inch General Map C... Dept. of the Interior, U.S. Geological Survey (Washington, D.C).
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