Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

pl23_theb1654.jpg

Image

Download ( 338 KB )

Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb1654jpg

Description

Shelton 100-meter comparator

Credit

NOAA, John Hayford Album

Display Date

1902?

Location

Midwest United States

Keywords

Geodesy

Triangulation

Baseline

Bar