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WOODEN TOWERS & SIGNAL POLES
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Coast-Geodetic-Survey
Geodesy
Triangulation
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Using a day marker as a tower.Photo#1 of sequence
3/18/2019 3:06:44 PM
Date:
1924
Credit:
Family of Captain Carl I. Aslakson, C&GS;
Location:
Florida, Lake Okeechobee
Subject:
Geodesy
Subject:
Triangulation
Subject:
Towers
Subject:
Wooden
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