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![Map of the 39th Parallel Arc theb1569.jpg Map of the 39th Parallel Arc](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1569.jpg?itok=losIX5tq)
Description
Map of the 39th Parallel Arc.The first great geodetic arc in the western hemisphere (Image credit: NOAA Central Library)
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