Descripcion de la costa de Tierra Firme desde el Rio de la Empalizada hasta Cavo de Clara. Por las latitudes y longitudes de Dn. Bartolome de Rosa.
Scale ca. 1:3,300,000.
Title on verso: Florida & Cuba, 140.
Manuscript, pen-and-ink, on tracing paper.
Soundings shown in fathoms.
Prime meridian: Ferro.
Shows Cuba, Bahama Islands, northern Yucatan Peninsula, and the coast of the United States from "Cape Clara" to the mouth of the Mississippi River.
LC Maps of North America, 1750-1789, 763
Available also through the Library of Congress Web site as a raster image.
AACR2: 650/1; 650/2; 651/3; 650/4; 650/5; 650/6
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.