• Creator
  • Geological Survey (U.S.)
  • Created Date
  • 1957-1957
  • Description
  • Relief shown by contours and spot heights.; "Topography in Illinois from aerial photographs by Kelsh plotter, Aerial photographs taken 1956. Field check 1957, Topography in Indiana by planetable surveys 1940-1941, Culture revised from aerial photographs taken 1956. Field check 1957."; Contour interval 10 feet. 45 x 35 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Geological Survey Division (Urbana, Ill.); Indiana Dept. of Conservati... more
    Relief shown by contours and spot heights.; "Topography in Illinois from aerial photographs by Kelsh plotter, Aerial photographs taken 1956. Field check 1957, Topography in Indiana by planetable surveys 1940-1941, Culture revised from aerial photographs taken 1956. Field check 1957."; Contour interval 10 feet. 45 x 35 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Geological Survey Division (Urbana, Ill.); Indiana Dept. of Conservation (Indianapolis, Ind.). less