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Description
Jasper Bilby setting up 60' reconnaissance pole.At Station Elbow - connecting with 98th Meridian Survey (Image credit: NOAA, John Hayford Album)
Credit
NOAA, John Hayford Album
Display Date
1903
Location
Minnesota
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Wooden Towers & Signal Poles
Keywords
Geodesy
Triangulation
Towers
Wooden