Base compiled in 1976 from USGS 1:24 000-scale topographic maps dated 1960-1972, revised from aerial photographs taken 1975; interpretations derived from soil map constructed 1974.; "Projection and 10 000-meter grid ticks, zone 16: Universal Transverse Mercator."; "25 000-foot grid ticks based on Illinois coordinate system, east zone."; May 1979.; Includes location map. 37 x 41 centimeters Scale 1:100,000
Creator:
United States. Soil Conservation Service
Publisher:
Dept. of Agriculture, Soil Conservation Service (Washington.)
Use of this item may be governed by US and international copyright laws. You may be able to use this item, but copyright and other considerations may apply. For possible additional information or guidance on your use, please contact the contributing organization.