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pl23_theb2462.jpg

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https://www.noaa.gov/media/digital-library-photo/pl23theb2462jpg

Description

Signal at Stillpond, Maryland.Instrument height of 120 feet - top of signal 275 feet.39th Parallel Survey.Record signal height from wooden tower

Credit

NOAA Central Library

Display Date

1880?

Location

Maryland

Collection

Historic Coast & Geodetic Survey

Geodesy

Triangulation

Wooden Towers & Signal Poles

Keywords

Geodesy

Triangulation

Towers

Wooden