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![Heliograph at Station 22 theb1632.jpg Heliograph at Station 22](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1632.jpg?itok=fhtvc7_V)
Description
Heliograph at Station 22.Alaska - Canada border.International Boundary Commission
Display Date
1911
Location
Alaska - Canada Boundary
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Heliotropes & Signal Lamps
Keywords
Geodesy
Triangulation
Lights
Helio