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Illinois Maps Topograp... (1)
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1. Indiana-Illinois, Vincennes quadrangle : topography Indiana-Illinois, Vincennes quadrangle : topography Maps; Topographic maps; Topography; Illinois; Indiana; Vincennes (Ind.) Relief shown by contours and spot heights.; "Surveyed in 1911-1913."; "Surveyed in cooperation with the State of Illinois."; "Contour interval 20 feet."; Coordinates: (W 87⁰45ʹ00ʺ--W 87⁰30ʹ00ʺ/N...

2. Illinois, Albion Quadrangle : 15-minute series. Illinois, Albion Quadrangle : 15-minute series. Illinois; Maps; Topographic maps; Topography; Albion (Ill.) Relief shown by contours and spot heights.; "Road classification 1945."; "Mapped by the Geological Survey 1943." Coordinates: (W 88⁰15ʹ00ʺ--W 88⁰00ʹ00ʺ/N 38⁰30ʹ00ʺ--N 38⁰15ʹ00ʺ)

3. Flora quadrangle, Illinois : 15 minute series (topographic) Flora quadrangle, Illinois : 15 minute series (topographic) Illinois; Maps; Topographic maps; Topography; Flora (Ill.) Relief shown by contours and spot heights.; "Contour interval 10 feet."; "Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods 1947-1948."; Coordinates:...

4. Illinois-Missouri, Campbell Hill quadrangle : topography Illinois-Missouri, Campbell Hill quadrangle : topography Illinois; Maps; Topographic maps; Topography; Campbell Hill; Missouri Relief shown by contours and spot heights.; "Surveyed in 1915-1916."; "Surveyed in cooperation with the States of Illinois and Missouri."; "Contour interval 20 feet."; Coordinates: (W 89⁰45ʹ00ʺ--W...
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