Vertical air photo: A20774-21
Flight height: 2,400 feet a.g.l.; lens focal length: 152.52 mm.
Scale: 1:4,800 (approx.)
Date: July 2, 1968
Location: Township 11, Range 6 WI
Map sheets: 1:250,000 62G:
1:50,000 62 G/16:
This very large-scale photo (1:3,000) shows the upper part of
The notation in the top right hand corner of the photo indicates that photo A20774-21 is the first in a line flown from east to west that includes photos 21-33. The photographs were taken on July 7, 1968 from a height of 2,400 feet above ground level[ii] using a camera having a lens with focal length 152.24 mm.
[i] W. F. Rannie, “The Portage la Prairie ‘Floodplain Fan’,” in Alluvial Fans: A Field Approach. eds. A. H. Rachocki and M. Church.