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Leveling operations making an observation across water

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb4161jpg

Description

Leveling operations making an observation across water. (Image credit: Collection of Captain Marvin Paulson, U.S. Coast and Geodetic Survey (ret.))

Credit

Collection of Captain Marvin Paulson, U.S. Coast and Geodetic Survey (ret.)

Display Date

1940 circa