pl23_theb1768.jpg
Description
Observing from level mounted on velocipede.Level center-mounted on velocipede.Crossing trestle on Southern Pacific Railroad.Level party of C. A. Egner
Credit
C&GS; Season's Report Egner 1920
Display Date
1920
Location
California
Category
Historic Coast & Geodetic Survey
Geodesy
Determining the Elevations - Leveling a Continent
Keywords
Geodesy
Leveling