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Coast Geodetic Survey
Historical Maps
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Field observations of angles showing different plate settings of theodolite.
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Field observations of angles showing different plate settings of theodolite.
4/3/2019 11:52:45 AM
Date:
1837 ca.
Credit:
NARA C&GS; Colllection
Location:
New York, Long Island
Subject:
Coast and Geodetic Survey
Subject:
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