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pl23_cgs02449.jpg

The level line was run around bends, through tunnels, and over trestles

Image

Download ( 1.4 MB )

Permalink

https://www.noaa.gov/media/digital-library-photo/pl23cgs02449jpg

Description

The level line was run around bends, through tunnels, and over trestles.The latter two are particularly dangerous and difficult for leveling operations.

Credit

Collection of NOAA/NOS/National Geodetic Survey William H. Burger Album

Display Date

1900

Collection

Historic Coast & Geodetic Survey

Keywords

Coast and Geodetic Survey