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![Extent of 1st and 2nd order level net as of July 1, 1936 theb1821.jpg Extent of 1st and 2nd order level net as of July 1, 1936](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1821.jpg?itok=CVxLUcXJ)
Description
Extent of 1st and 2nd order level net as of July 1, 1936.W.P.A. computation party of Ralph Pfau (Image credit: C&GS; Season's Report Pfau 1938-3)
Credit
C&GS; Season's Report Pfau 1938-3
Display Date
1938
Location
United States
Collection
Historic Coast & Geodetic Survey
Geodesy
Determining the Elevations - Leveling a Continent
Keywords
Geodesy
Leveling