Flights flown between July 9, 1938 and August 2, 1938 by Park Aerial Surveys, Inc., for the U. S. Dept. of Agriculture, Agricultural Adjustment Administration. Photos numbered RZ-4-305 through RX-36-3339. Scale not given. Stereoscopic coverage. Only indexes are georeferenced.
Fulton County (Ill.) (W 90°26′--W 89°53′/N 40°43′--N 40°11′)
Illinois State Geological Survey
671 remote-sensing images, 1.72 gigabytes, average file 2.6 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.