Geographers Flanders
Gerardus Mercator, birth name Gheert Cremer was a Flemish geographer and cartographer, best known for the map projection that bears his name.
Gerardus Mercator was the first to use this equiangular cylindrical projection for drawing a navigational chart of the world on 18 sheets (1569). The Mercator projection is remarkable in that it does not distort angles and shapes and only keeps distances at the equator. It is currently used for nautical navigational and aeronautical charts. Although modern historical cartographic research has established that this projection was used as early as 1511, it is only by Mercator that it has become widely used.
Abraham Ortelius (Ortels) was a Brabantian cartographer, geographer, and cosmographer. He is recognized as the creator of the first modern atlas, the Theatrum Orbis Terrarum (Theatre of the World). Along with Gemma Frisius and Gerardus Mercator, Ortelius is generally considered one of the founders of the Netherlandish school of cartography and geography. He was a notable figure of this school in its golden age (approximately 1570s–1670s) and an important geographer of Spain during the age of discovery. The publication of his atlas in 1570 is often considered as the official beginning of the Golden Age of Netherlandish cartography. He was the first person proposing that the continents were joined before drifting to their present positions. Beginning as a map-engraver, in 1547 he entered the Antwerp Guild of Saint Luke as an illuminator of maps. In 1560 when travelling with Mercator to Trier, Lorraine, and Poitiers, he seems to have been attracted, largely by Mercator's influence, towards the career of a scientific geographer. In 1564 he published his first map, Typus Orbis Terrarum, an eight-leaved wall map of the world. On 20 May 1570, Gilles Coppens de Diest at Antwerp issued Ortelius's Theatrum Orbis Terrarum, the "first modern atlas" (of 53 maps).