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Okinawajima nanbu : Nihon Nansei Shotō = Southern portion of Okinawa Sima : Nippon Nansei Syotō.
Summary
Possibly a draft prepared for reproduction by Hydrographic Office, U.S. Navy.
Relief shown by contours and spot heights. Depths shown by soundings.
A seal "Hydrographic Office, U.S. Navy"; and "Emergency reproduction of Japanese charts"--On a piece of paper pasted on map.
"From H.O.N.M.: from other sources: Printed by H.O., Aug '44 [date handwritten]"; also "Soundings and heights in meters"; and "Fathoms to meters" (table)--Printed on pieces of paper pasted on map.
"Jap. No. 222, H.O. miscel. no. 10 010-52"
Available also through the Library of Congress Web site as a raster image.
"佐世保鎮守府文庫"--Stamped. DLC
On verso of map "増設タンク取付部" [design drawing of a machine in color]; with "佐世保鎮守府文庫 ... 昭和 16年 [1941] ..."; also "Condemned, July 16 1947" stamped. DLC
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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