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Signaling with heliograph near Monument 92 Picture

Signaling with heliograph near Monument 92

Signaling with heliograph near Monument 92. Alaska - Canada border. International Boundary Commission

Photo Category: Geodesy - Triangulation - Lights - Helio
Photo Location: Alaska - Canada Boundary
Photo Date: 1910

Author: NOAA

License: Public Domain Mark 1.0 (Public domain)
640 x 419 60.72 KB
1280 x 838 241.53 KB
1376 x 900 380.68 KB
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Added On
18th October 2015
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