United States. Soil Conservation ServiceBase source: USGS 1:100,000 county base map compiled in 1975; interpretations derived from soil map constructed 1974.; "Projection and 10,000-metre grid ticks, zone 15: Universal Transverse Mercator."; "25,000-foot grid ticks based in Illinois coordinate system, west zone."; June 1977.; Includes location map.92 x 122 centimetersJPEGUMN_ALMA:9964569010001701engDept. of Agriculture, Soil Conservation Service (Washington.)PublicAgricultureLogan County, IllinoisMapsIllinois--Logan CountyIllinoisUniversity of Minnesota