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![Looking down from the top of a 50-foot tower theb2533.jpg Looking down from the top of a 50-foot tower](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2533.jpg?itok=17LGp5GE)
Description
Looking down from the top of a 50-foot tower.Triangulation party of Wilbur Porter (Image credit: NOAA, George E. Marsh Album)
Credit
NOAA, George E. Marsh Album
Display Date
1934
Location
Midwestern United States
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Bilby Steel Towers
Keywords
Geodesy
Triangulation
Towers
Bilby Steel