This disc contains 577 image files scanned from original negative film at the Aerial Photography Field Office in Salt Lake City Utah File information: WILLIAMS COUNTY NORTH DAKOTA Format : Tiff Size : 135 MB Resolution : 20 Micron Work order number: 1023208 Questions or comments please contact us: Aerial Photography Field Office 2222 W 2300 South Salt Lake City, UT 84119 801-844-2900 www.apfo.usda.gov