pl23_theb2486.jpg

Rock cairn signal at divide between two main forks of the Ladue River

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb2486jpg-0

Description

Rock cairn signal at divide between two main forks of the Ladue River.International Boundary Commission surveyor

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