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Description
Rock cairn signal at divide between two main forks of the Ladue River.International Boundary Commission surveyor (Image credit: National Geographic Magazine July 1912)
Credit
National Geographic Magazine July 1912
Display Date
1911
Location
Alaska-Canada Boundary 141st Meridian
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Wooden Towers & Signal Poles
Keywords
Geodesy
Triangulation
Towers
Wooden