Flights flown between June 19, 1940 and July 29, 1940 by Woltz Studios, Inc., for the U. S. Dept. of Agriculture, Agricultural Adjustment Administration. Photos numbered AM-1A-7 through AM-5A-54. Scale not given. Stereoscopic coverage. Only indexes are georeferenced.
Piatt County (Ill.) / W0894500-W0882800 / N0401700-N0394800
Illinois State Geological Survey
105 remote-sensing images, 0.70 gigabytes, average file 6.82 megabytes
Scanned from 9 x 9 contact prints (nominal scale ca. 1:20,000) on Crosfield Celsis 6200 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.
Mode of access: World Wide Web. System requirements: Plug-in or image viewer, ExpressView Browser plug-in available for download. System requirements for interactive map: Google Chrome best.