pl23_theb0974.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb0974jpg-0Description
Portion of photo panel to control aerial photography.These panels served to locate control points in aerial photographs
Credit
NOAA Office of Coast Survey
Collection
Historic Coast & Geodetic Survey
Geodesy
Topography-Mapping the Shoreline
Photogrammetry
Keywords
Geodesy
Topography
Photogrammetry