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OBSERVING THE ANGLES
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Coast-Geodetic-Survey
Geodesy
Triangulation
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White Pass West Base along the 141st Meridian.International Boundary Survey
3/18/2019 2:40:24 PM
Credit:
National Geographic Magazine July 1912
Location:
Alaska - Canada Boundary
Subject:
Geodesy
Subject:
Triangulation
Subject:
Angles
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