Martin Waldseemüller (September 11, 1470 - March 16, 1520) was a German cartographer, astronomer, and mathematician credited with creating, along with Matthias Ringmann, the first map to use the placename America. He was born in Wolfenweiler, near Freiburg im Breisgau. Waldseemüller studied at the University of Freiburg and, on April 25, 1507, became a member of the Gymnasium Vosagese at Saint-Dié. Martin Waldseemüller was a major proponent of theoretical or additive cartography. Unlike contemporary Portuguese and Spanish cartographers, who left maps blank where knowledge was lacking, Waldseemüller and his peers speculated based upon geographical theories to fill unknown parts of the map. He is best known for his Universalis Cosmographia a massive 12-part wall map of the world considered the first map to contain the name America, today dubbed as 'America's Birth Certificate'. This map also had significance on other levels, as it combined two previously unassociated geographical styles: Ptolemaic Cartography, based on an ancient Greek model, and the emergent 'carta marina', a type of map commonly used by European mariners in the late 15th and 16th centuries. It also extended the traditional Ptolemaic model westward to include the newly discovered continent of America, which Waldseemüller named after the person he considered most influential in its discovery, Amerigo Vespucci. When Waldseemüller died in 1520, he was a canon of the collegiate Church of Saint-Dié. In contemporary references his name is often Latinized as Martinus Ilacomylus, Ilacomilus, or Hylacomylus. More by this mapmaker...

Claudius Ptolemy (83 - 161 AD) is considered to be the father of cartography. A native of Alexandria living at the height of the Roman Empire, Ptolemy was renowned as a student of Astronomy and Geography. His work as an astronomer, as published in his Almagest, held considerable influence over western thought until Isaac Newton. His cartographic influence remains to this day. Ptolemy was the first to introduce projection techniques and to publish an atlas, the Geographiae. Ptolemy based his geographical and historical information on the "Geographiae" of Strabo, the cartographic materials assembled by Marinus of Tyre, and contemporary accounts provided by the many traders and navigators passing through Alexandria. Ptolemy's Geographiae was a groundbreaking achievement far in advance of any known pre-existent cartography, not for any accuracy in its data, but in his method. His projection of a conic portion of the globe on a grid, and his meticulous tabulation of the known cities and geographical features of his world, allowed scholars for the first time to produce a mathematical model of the world's surface. In this, Ptolemy's work provided the foundation for all mapmaking to follow. His errors in the estimation of the size of the globe (more than twenty percent too small) resulted in Columbus's fateful expedition to India in 1492.

Ptolemy's text was lost to Western Europe in the middle ages, but survived in the Arab world and was passed along to the Greek world. Although the original text almost certainly did not include maps, the instructions contained in the text of Ptolemy's Geographiae allowed the execution of such maps. When vellum and paper books became available, manuscript examples of Ptolemy began to include maps. The earliest known manuscript Geographias survive from the fourteenth century; of Ptolemies that have come down to us today are based upon the manuscript editions produced in the mid 15th century by Donnus Nicolaus Germanus, who provided the basis for all but one of the printed fifteenth century editions of the work. Learn More...