Vertical air photograph: A20811-36
Flight height: 10,300 feet a.s.l.; lens focal length: 6 inches
Date: September 28, 1968
Scale: 1:17,800 (approx.)
Location: Township 5; Range 25 WI
Map sheets: 1:250,000 62F Virden
1:50,000 62F/7 Hartney
The two photographs show the same stretch of the
Also the photo in figure 4.4b was taken several years before photo in figure 4.4a so changes in the landscape can be observed:
1) a drainage ditch 7 has been constructed on figure 4.4a.
2) several dugouts 8 have been constructed on figure 4.4a.
3) gravel roads have been constructed 9 or improved 10 on figure 4.4a.
Note also, the orientation of the photo in 4.4a is unusual in that the sides are not east/west and north/south. It is part of a sequence of photos taken along the course of the