pl23_theb1821.jpg
Description
Extent of 1st and 2nd order level net as of July 1, 1936.W.P.A. computation party of Ralph Pfau
Credit
C&GS; Season's Report Pfau 1938-3
Display Date
1938
Location
United States
Category
Historic Coast & Geodetic Survey
Geodesy
Determining the Elevations - Leveling a Continent
Keywords
Geodesy
Leveling