Surveyor taking sun azimuth for true direction to determine magnetic declination
from magnetic observations.
Image ID: cgs02151, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1957 Ca.
Category: Coast and Geodetic Survey/Geophysics Geomagnetism/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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June 10, 2016