Flights flown between August 1, 1939 and August 20, 1939 by Midwest Aerial Surveys, Inc., for the U. S. Dept. of Agriculture, Agricultural Adjustment Administration. Photos numbered BWW-1-2 through BWW-3-33. Scale not given. Stereoscopic coverage. Only indexes are georeferenced.
Kendall County (Ill.) (W 88°36′--W 88°15′/N 41°43′--N 41°27′)
Illinois State Geological Survey
187 remote-sensing images, 666 megabytes, average file 3.6 megabytes
Scanned from 9 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.