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OBSERVING THE ANGLES
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Coast-Geodetic-Survey
Geodesy
Triangulation
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Map of the 39th Parallel Arc.The first great geodetic arc in the western hemisphere
3/18/2019 2:40:23 PM
Date:
1871 - 1901
Credit:
NOAA Central Library
Location:
United States
Subject:
Geodesy
Subject:
Triangulation
Subject:
Angles
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