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.).
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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. Lannoo, Michael J., Blackburn, Laura, and Nanjappa, Priya. This polygon shapefile portrays the distribution of 10 selected amphibians in the United States, based on historical literature and museum records ... National Atlas of the United States.
1876. United States. Mississippi River Commission. Survey of the Mississippi River; made under the direction of the Mississippi River Commission. Contains Charts 101-134. Each chart is at a scale of... Mississippi River Commission.
1876. United States. Mississippi River Commission. Survey of the Mississippi River; made under the direction of the Mississippi River Commission. Contains Charts 135-148, 150, 152-165, 167-168, 470-... Mississippi River Commission.
2006. National Atlas of the United States. This polygon shapefile contains federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of... National Atlas of the United States.
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.
1881. Prime meridian: Greenwich.; Include 3 cross-sections.; "Plate No. I." 69 x 59 centimeters Scale approximately 1:960,000 General Map Collection. Commissioners of Public Printing (Madison).
1909. Van Hise, Charles Richard, 1857-1918. Relief shown by contours.; Covers area from Cranberry Lake to Gogebic Lake.; "Contour interval 20 feet."; "U.S. Geological Survey." "Monograph LII,... U.S. Geological Survey (Washington, D.C).
1878. Irving, Roland Duer, 1847-1888. At top right: "Plate Number XXII."; "The Magnetic Belt and underlying formations of the Huronian across T. 44, R. 5 W., where the rocks are conceal... Mithwaukee Litho. & Engr. Co (Milwaukee, Wisconsin).