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Using a stereoscope to bring images on adjacent photographs into coincidence.
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Image ID: theb0928, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Washington, D.C.
Photo Date: 1921
Credit: C&GS Season's Report Mattison 1921-69
Category: Geodesy/Topography/Photogrammetry/
• High Resolution Photo Available
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