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Chart of the coast of Maine / nautical chart
Summary
Relief shown by hachures on some sheets. Depths shown by soundings on some sheets.
On some sheets: Entered according to Act of Congress, by Capt. Seward Porter, in the year 1837, in the Clerks office of the District Court of Massachusetts.
Some sheets lack geographic coordinates and bar scale.
Orientation varies.
Sheets numbered: No. 1 ... No. 9.
Ristow. American maps and mapmakers.
Available also through the Library of Congress Web site as a raster image.
Accompanied by: Chart of the coast of Maine, No. 10. 1 sheet : photocopy of ms. map with inset ; 44 x 71 cm.
Some sheets include ill. of ships.
LC copy mounted on cloth backing. Some LC sheets annotated in ink in margin.
Vault
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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