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Detail of the American coast from Diogo Ribeiro's 1529 map. Pen-and-ink and blue watercolor, mounted on cloth, mounted on paper. Traced by Johann Georg Kohl from a map by Diogo Ribeiro, 1840. Diogo Ribeiro was a Portuguese cartographer and explorer who worked most of his life in Spain. He worked on the official maps of the Padrón Real (or Padrón General) from 1518-1532. The layout of the map (Mapamundi) is strongly influenced by the information obtained during the Magellan-Elcano trip around the world. The map delineates very precisely the coasts of Central and South America. It shows the whole east coast of the Americas but of the west coast only the area from Guatemala to Ecuador. The map shows, for the first time, the North American coast as a continuous one.