unified cosmographic depiction the traditional Ptolemaic geography of Europe, Asia and Africa with the new geographical information provided by Amerigo Vespucci and his fellow discoverers of lands in the western hemisphere. He explained: "In designing the sheets of our world-map we have not followed Ptolemy in every respect, particularly as regards the new lands ... We have therefore followed, on the flat map, Ptolemy, except for the new lands and some other things, but on the solid globe, which accompanies the flat map, the description of Amerigo that is appended hereto." Several earlier maps are believed to be sources, chiefly those based on the Geography (Ptolemy) and the Caveri planisphere and others similar to those of Henricus Martellus or Martin Behaim. The Caribbean and what appears to be Florida were depicted on two earlier charts, the Cantino map, smuggled from Portugal to Italy in 1502 showing details known in 1500, and the Caverio map, drawn circa 1503–1506 and showing the Gulf of Mexico. While some maps after 1500 show, with ambiguity, an eastern coastline for Asia distinct from the Americas, the Waldseemüller map apparently indicates the existence of a new ocean between the trans-Atlantic regions of the Spanish discoveries and the Asia of Ptolemy and Marco Polo as exhibited on the 1492 Behaim globe. The first historical records of Europeans to set eyes on this ocean, the Pacific, are recorded as Vasco Núñez de Balboa in 1513. That is five to six years after Waldseemüller made his map. In addition, the map apparently predicts the width of South America at certain latitudes to within 70 miles. However, as pointed out by E.G. Ravenstein, this is an illusory effect of the cordiform projection used by Waldseemüller, for when the map is laid out on a more familiar equirectangular projection and compared with others of the period also set out on that same projection there is little difference between them: this is particularly evident when the comparison is made with Johannes Schöner's 1515 globe. Apparently among most map-makers until that time, it was still erroneously believed that the lands discovered by Christopher Columbus, Vespucci, and others formed part of the Indies of Asia. Amerigo Vespucci said: "After we sailed ca. 400 leagues along the coast without interruption, we concluded that this is mainland, by which I mean that it forms the easternmost point of Asia and the first tip of Asia reached