These three charts depict the same area near San Francisco at three different times—1859, 1974, and 2006.
Revised
December 12, 2006
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National Oceanic and Atmospheric Administration | U.S. Department of Commerce
http://celebrating200years.noaa.gov/foundations/nautical_charts/image3.html
National Oceanic and Atmospheric Administration | U.S. Department of Commerce
http://celebrating200years.noaa.gov/foundations/nautical_charts/image3.html