pl23_theb1755.jpg
![Rodman holding rod vertical during observations theb1755.jpg Rodman holding rod vertical during observations](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1755.jpg)
Description
Rodman holding rod vertical during observations.
Credit
NOAA, John Hayford Album
Display Date
1900?
Collection
Historic Coast & Geodetic Survey
Geodesy
Determining the Elevations - Leveling a Continent
Keywords
Geodesy
Leveling