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![Instrument station near Station 189 theb1570.jpg Instrument station near Station 189](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1570.jpg?itok=AXtUVLDV)
Description
Instrument station near Station 189.Care needed in moving.International Boundary Survey (Image credit: NOAA Central Library)
Credit
NOAA Central Library
Display Date
1906
Location
Alaska - Canada 141st Meridian
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Observing the Angles
Keywords
Geodesy
Triangulation
Angles