• Creator
  • Geological Survey (U.S.)
  • Created Date
  • 1948-1948
  • Description
  • Relief shown by contours and spot heights.; "Culture and drainage in part compiled from aerial photographs taken 1938. Topography by plane-table methods 1946."; Contour interval 20 feet.; Coordinates (W 88⁰30’00"--W 88⁰15’00"/N 38⁰30’00"--N 38⁰15’00"). 45 x 35 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Geological Survey Division (Urbana, Ill.).