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Start Over Creator Geological Survey (U.S.) Bounding Box -86.51116 39.149274 -86.508949 39.150938

281. Walnut quadrangle, Illinois : 15 minute series (topographic)

University Of Illinois Urbana Champaign Public content
1949. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1937, 1939 and 1941. Topography by plane-table metho... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

282. Wapello quadrangle, Iowa-Illinois : 15 minute series (topographic)

University Of Illinois Urbana Champaign Public content
1949. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods, 1946.";Reli... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).

283. Xenia quadrangle, Illinois : 15 minute series (topographic)

University Of Illinois Urbana Champaign Public content
1954. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1938 and 1949. Topography by plane-table surveys 195... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).