• Illinois-Missouri Hardin quadrangle

    Geological Survey (U.S.)

    Contour interval 20 feet. "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army." "Surveyed in 1927." Relief shown by contours and spot heights. 1 map, colored

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  • Illinois-Iowa, Lomax quadrangle

    Geological Survey (U.S.)

    Contour interval 10 feet "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army" "Surveyed in 1931-1932" Relief shown by contours and spot heights. Shows roadway…

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  • Illinois, Potomac quadrangle.

    Geological Survey (U.S.)

    Contour interval 10 feet "Surveyed in 1931-1932" (W 88⁰00ʹ00ʺ--W 87⁰45ʹ00ʺ/N 40⁰30ʹ00ʺ--N 40⁰15ʹ00ʺ) Relief shown by contours and spot heights. Shows roadway classification as of 1934. 1 map, colored

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  • Illinois, Springfield quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 10 feet. "Surveyed in 1905." "Surveyed in cooperation with the State of Illinois." Relief indicated by contours and spot heights. 1 map, colored

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  • Illinois, Tallula quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 10 feet. "Surveyed in 1906-1907." "Surveyed in cooperation with the State of Illinois." (W 90⁰00ʹ00ʺ--W 89⁰45ʹ00ʺ/N 40⁰00ʹ00ʺ--N 39⁰45ʹ00ʺ) Relief indicated by contours and spot heigh…

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  • Illinois, Kings quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 20 feet. "Surveyed in 1917." "Surveyed in cooperation with the War Department and the State of Illinois." Relief shown by contours and spot heights. 1 map, colored

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  • Erie quadrangle, Illinois : 15 minute series (topographic)

    Geological Survey (U.S.)

    Contour interval 10 feet. "Topography from aerial photographs by Kelsh plotter and by plane-table surveys 1952. Aerial photographs taken 1951" Relief shown by contours and spot heights. 1 map, colored

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  • Illinois-Indiana, Carmi quadrangle : 15-minute series

    Geological Survey (U.S.)

    Contour interval 10 feet. "Surveyed in 1921 and 1939-1940." "Topography in Indiana from chart of the Wabash River by Corps of Engineers, U.S. Army." (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 38⁰15ʹ00ʺ--N 38⁰00ʹ00ʺ)…

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  • Illinois-Indiana, Calumet quadrangle : topographic sheet

    Geological Survey (U.S.)

    Contour interval 10 feet "Surveyed in 1889, 1897 and 1899." Relief shown by contours. 1 map, colored

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  • Illinois-Indiana, Danville quadrangle : topographic sheet

    Geological Survey (U.S.)

    Contour interval 10 feet. "Surveyed in 1897. Relief indicated by contours and spot heights. 1 map, colored

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  • Wisconsin-Illinois, Monroe quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 20 feet. "Surveyed in 1919-1920." "Surveyed in cooperation with the States of Wisconsin and Illinois." Relief shown by contours and spot heights. 1 map, colored

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  • Missouri-Illinois, Hannibal quadrangle

    Geological Survey (U.S.)

    Contour interval 20 feet. "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army." "Surveyed in 1921 and 1928." (W 91⁰30ʹ00ʺ--W 91⁰15ʹ00ʺ/N 39⁰45ʹ00ʺ--N 39⁰30ʹ00ʺ…

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  • Illinois (Macoupin County), Carlinville quadrangle

    Geological Survey (U.S.)

    Contour interval 10 feet. "Surveyed in 1923." Relief shown by contours and spot heights. 1 map, colored

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  • Arrowsmith quadrangle, Illinois : 15 minute series (topographic)

    Geological Survey (U.S.)

    Culture and drainage in part compiled from aerial photographs taken 1948. Topography by plane-table surveys, 1930 and 1951-1952. Includes quadrangle location map. Relief shown by contours and spot hei…

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  • Illinois (Warren County), Monmouth quadrangle

    Geological Survey (U.S.)

    Surveyed in 1920-1921. (W 90⁰45ʹ00ʺ--W 90⁰30ʹ00ʺ/N 41⁰00ʹ00ʺ--N 40⁰45ʹ00ʺ) Contour interval 20 feet. 1 map, colored

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  • Illinois, Canton quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 20 feet. "Surveyed in 1910." "Surveyed in cooperation with the State of Illinois." Relief indicated by contours. 1 map, colored

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  • Illinois, Galatia quadrangle : topography

    Geological Survey (U.S.)

    Contour interval 20 feet. "Surveyed in 1906." "Surveyed in cooperation with the State of Illinois. Relief indicated by contours and spot heights. 1 map, colored

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  • Illinois (Shelby Co.), Shelbyville quadrangle : 15-minute series

    Geological Survey (U.S.)

    Contour interval 20 feet. "Mapped by the Geological Survey 1928, 1935 and 1942" Relief shown by contours and spot heights. 1 map, colored

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  • Illinois, De Kalb quadrangle

    Geological Survey (U.S.)

    Contour interval 10 feet "Culture and drainage in part compiled from aerial photographs taken by Air Corps, U.S. Army." "Surveyed in 1934" Relief shown by contours and spot heights. Shows roadway clas…

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  • Illinois, Arcola quadrangle

    Geological Survey (U.S.)

    Surveyed in 1930 and 1935. Relief shown by contours and spot heights. 1 map, colored

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