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Chesapeake Bay. Sheet 6, from the mouth of York River to the entrance to bay.
Summary
Scale 1:80,000.
LC Civil War Maps (2nd ed.), 47.52
From its Report of the Superintendent of the Coast Survey showing the progress of the survey during the year 1862 (Washington, Government Printing Office, 1864). Map 15.
"No. 15" is in the upper left corner.
At head of title: Coast chart no. 36.
Similar to the preceeding chart, but with a change in the title.
Description derived from published bibliography.
Available also through the Library of Congress web site as raster image.
The word portolan comes from the Italian adjective portolano, meaning "related to ports or harbors", or "a collection of sailing directions". Portolan charts are maps based on compass directions and estimated distances observed by the pilots at sea. They were first made in the 13th century in Italy, and later in Spain and Portugal where they considered to be state secrets. The English and Dutch found the description of Atlantic and Indian coastlines extremely valuable for their raiding, and later trading, ships. The oldest survived portolan is the Carta Pisana, dating from approximately 1296 and the oldest preserved Majorcan Portolan chart is the one made by Angelino Dulcert who produced a portolan in 1339.
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