DIGITAL ORTHOPHOTO (DOP) COVERAGE FOR DOUGLAS COUNTY
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* Due to poor foliage conditions, this county was captured over two subsequent fall seasons (2020, 2021). *

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: 30 points used, all existing photo-identifiable
ACCURACY: 1"=500' NMAS at block level
COMPRESSION FACTOR:  20:1
FILE SIZE: 2.8 GB
SOURCE IMAGERY: September 21-October 5, 2020; September 28-September 29, 2021
LEAF: Peak fall color
SPECTRA: CIR
SCALE OF SOURCE PHOTOGRAPHY: 1:15,840
RECTIFICATION SOURCE: 10m National Elevation Dataset
USAGE RESTRICTIONS: No usage restrictions.