Flights flown between June 25, 1940 and September 5, 1940 by Woltz Studios, Inc., for the U. S. Dept. of Agriculture, Agricultural Adjustment Administration. Photos numbered SL-1A-3 through SL-7A-47. Scale not given. Stereoscopic coverage. Only indexes are georeferenced.
Monroe County (Ill.) (W 90°22′--W 89°54′/N 38°32′--N 38°05′)
Illinois State Geological Survey
349 remote-sensing images, 1.02 gigabytes, average file 3.0 megabytes
Scanned from 7 x 9 contact prints (nominal scale ca. 1:20,000) on Crosfield 646IE drum scanning system at 750 dpi. Quality assurance target not published but available by contacting the Illinois State Library Map Dept. MrSID files compressed at a target ratio of 12:1. Uncompressed TIFF images on cd available from the Illinois State Library Map Dept.