Digital Library Search
![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)
Description
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