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pl23_theb1569.jpg

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb1569jpg

Description

Map of the 39th Parallel Arc.The first great geodetic arc in the western hemisphere

Credit

NOAA Central Library

Display Date

1871 - 1901

Location

United States

Collection

Historic Coast & Geodetic Survey

Geodesy

Triangulation

Observing the Angles

Keywords

Geodesy

Triangulation

Angles