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WOODEN TOWERS & SIGNAL POLES
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Coast-Geodetic-Survey
Geodesy
Triangulation
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115-foot tower built around tree on Sarangani Island.
3/18/2019 3:06:43 PM
Date:
1923
Credit:
Family of Captain Roland D. Horne, C&GS;
Location:
Philippine Islands
Subject:
Geodesy
Subject:
Triangulation
Subject:
Towers
Subject:
Wooden
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