DIGITAL ORTHOPHOTO (DOP) COVERAGE FOR Trempealeau COUNTY ----------------------------------------------------- FORMAT: Mr. Sid PRODUCER OF ORIGINAL DOP: Surdex (flight and orthorectification) CUSTODIAN OF ORIGINAL DOP: WI DNR - Division of Forestry INTENDED DISPLAY SCALE: 20:1 Compression GROUND RESOLUTION: 18 inch pixels PROJECTION: Wisconsin Transverse Mercator (WTM) HORIZONTAL DATUM: NAD83, 1991 Adjustment Methods Used to Derive Control Points: 10 points used, all photo-identifiable ACCURACY: 1"=500' NMAS at block level COMPRESSION FACTOR: 20:1 FILE SIZE: 2.7 GB SOURCE IMAGERY: Fall 2013 LEAF: Peak fall SPECTRA: RGB SCALE OF SOURCE PHOTOGRAPHY: 1:15,840 RECTIFICATION SOURCE: 10m National Elevation Dataset USAGE RESTRICTIONS: No usage restrictions.