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https://www.noaa.gov/media/digital-library-photo/pl23cgs05420jpg-0Description
Note establishing contour interval and mean high water of Potomac River asvertical datum for elevations.
Display Date
1881
Location
Virginia, Maryland, Washington, D.C. Potomac River
Collection
Historic Coast & Geodetic Survey
Historic Maps
General
Keywords
Coast and Geodetic Survey
Archive Topographic Survey