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![Collimating the inner tower at Station Winnie theb2537.jpg Collimating the inner tower at Station Winnie](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2537.jpg?itok=9SmsYhzy)
Description
Collimating the inner tower at Station Winnie.Collimation involved placing the observing instrument directly over the mark.Triangulation party of Carl I. Aslakson (Image credit: Captain Ray Tryon, C&GS;)
Credit
Captain Ray Tryon, C&GS;
Display Date
21-Aug-34
Location
Itasca County, Minnesota
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Bilby Steel Towers
Keywords
Geodesy
Triangulation
Towers
Bilby Steel