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![Bronze triangulation mark theb3049.jpg Bronze triangulation mark](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb3049.jpg?itok=FJbRPkdV)
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https://www.noaa.gov/media/digital-library-photo/pl23theb3049jpg-0Description
Bronze triangulation mark.These marks are found throughout the United States and its territories.Triangulation marks have known latitudes, longitudes, and plane coordinates (Image credit: NOAA)
Credit
NOAA
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Marks