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pl23_theb1552.jpg

Using gas drill to drill hole for bench mark

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb1552jpg

Description

Using gas drill to drill hole for bench mark

Credit

NOAA

Location

Southeast Alaska

Collection

Historic Coast & Geodetic Survey

Geodesy

Survey Marks

Keywords

Geodesy

Marks