Cartographic Details: Scale 1:500,000 ; Modified polyconic projection (W 97‚Å∞15 π--W 89‚Å∞30 π/N 49‚Å∞23 π--N 43‚Å∞30 π). Sheets numbered 23NE, 23NW, 23SE, and 23SW. Base map from U.S. Geological Survey state map. "Published in accordance with Act of Congress approved Nov. 9, 1921, creating the Federal Aid Highway System. Data corrected to Dec....
Creator:
United States. Bureau of Public Roads. Geological Survey (U.S.)
Created:
1927
Contributed By:
University of Minnesota Libraries, John R. Borchert Map Library.
Cartographic Details: Scale 1:500,000 ; Modified polyconic projection (W 97‚Å∞15 π--W 89‚Å∞30 π/N 49‚Å∞23 π--N 43‚Å∞30 π). Sheets numbered 23NE, 23NW, 23SE, and 23SW. Base map from U.S. Geological Survey state map. "Published in accordance with Act of Congress approved Nov. 9, 1921, creating the Federal Aid Highway System. Data corrected to July...
Creator:
United States. Bureau of Public Roads. Geological Survey (U.S.)
Created:
1937
Contributed By:
University of Minnesota Libraries, John R. Borchert Map Library.