1949. Geological Survey (U.S.). Culture and drainage in part compiled from aerial photographs taken 1940. Topography by plane-table methods, 1946.;Contour interval 10 feet.;Relief... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1915. Geological Survey (U.S.). Scale 1:62,500 Relief shown by contours and spot heights. Contour interval 50 ft. "Surveyed in 1893-94." Text and ill. on verso. Department of the ... The Survey.
1904. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Datum is mean sea level." sheets 69 x 110 centimeters or smaller Scale 1:31,680 General Map Collection. The Survey (Washington, D.C).
24. Camp Dodge
1918. Geological Survey (U.S.). Relief shown by contours and spot heights.; Title in upper right corner: Iowa, Camp Dodge quadrangle; at head of map: Topography.; "Surveyed in 190... The Survey (Washington, D.C).
1919. Geological Survey (U.S.). Relief shown by contours and spot heights.; Alternate title in upper right corner: Georgia, Camp Gordon and vicinity; at head of map: Topography.; ... The Survey (Washington).
1958. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1956. Topography by planetable surveys 1957.";Relief ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1901. Geological Survey (U.S.). Relief shown by contours.; "Reconnaissance map."; "Survey in 1888."; "Engraved Oct 1891 by U.S.G.S."; Shows roads, and railroads.; Text on verso. 4... The Survey (Washington, D.C).
1909. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Control by Coast and Geodetic Survey."; "Surveyed in 1906-1907. Edition of May 1909, reprinted 1921. A... The Survey (Washington).
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.).