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https://www.noaa.gov/media/digital-library-photo/pl23cgs05223jpgDescription
Chart of Half Moon Bay, California. From a Trigonometrical Survey. This chartshows that even though the main activities of the Coast Survey were associatedwith the Civil War effort, a small amount of work was still being conducted onthe West Coast. The triangulation, topography, and hydrography were allconducted by Augustus Rodgers, a brother of RADM John Rodgers, USN. (Image credit: NARA C&GS; Colllection)