Gerardus Mercator

Dorpsgezicht Rupelmonde

Portret Macropedius, Philips Galle-cropped

Vesalius Portrait pg xii - c

Georg-Cassander

Monachus 1527 globe map 05

Gerardus Mercator (5 March 1512 – 2 December 1594) was a 16th-century geographer, cosmographer, and cartographer from the County of Flanders, a region that today spans parts of Belgium, France, and the Netherlands. He is most renowned for creating the 1569 world map based on a new projection that represented sailing courses of constant bearing as straight lines—an innovation that is still employed in nautical charts and is known as the Mercator projection.

Early Life

Gerardus Mercator was born in Rupelmonde in the County of Flanders, where he was named Gerhard Kremer. Mercator is the Latinized version of his name, which was a common practice among scholars during the Renaissance. His interest in mathematics, astronomy, and geography led him to study at the University of Leuven, where he was exposed to the ideas of Ptolemy, the ancient geographer, and others.

Career

Mercator's early work involved the creation of globes, scientific instruments, and maps. In 1536, he produced his first map, of the Holy Land, and in 1537 he created a terrestrial globe. His work gained the attention of European scholars, and he became a notable figure in the scientific community of the time.

In 1544, Mercator was arrested for heresy, likely due to his association with Protestant scholars, but he was released after seven months. In 1552, he moved to Duisburg, in the Holy Roman Empire, where he would spend the rest of his life. There, he established a cartographic workshop where he produced maps and globes.

Mercator's most significant contribution to cartography came in 1569, with the creation of a world map titled Nova et Aucta Orbis Terrae Descriptio ad Usum Navigantium Emendate Accommodata (New and more complete representation of the terrestrial globe properly adapted for use in navigation). This map employed a revolutionary projection that allowed for the representation of rhumb lines, or loxodromes, as straight lines, facilitating easier navigation across the oceans. Although the Mercator projection distorts the size of objects as the latitude increases from the Equator to the poles, it was invaluable for navigation and became the standard for nautical charts.

Later Life and Legacy

In his later years, Mercator focused on compiling and summarizing geographic knowledge of the time into a series of maps and texts. His last major work, the Atlas sive Cosmographicae Meditationes de Fabrica Mundi et Fabricati Figura, was published posthumously in 1595. This work, simply known as the Mercator Atlas, compiled all of Mercator's cartographic works and laid the foundation for the modern concept of an atlas.

Mercator's legacy in cartography and geography is immense. His name is synonymous with the Mercator projection, and his work laid the groundwork for the modern understanding of world geography. He was a pioneer in creating a more accurate representation of the world, and his methodologies and innovations continue to influence the field of cartography.

See Also

• Cartography
• History of Cartography
• Map projection
• Nautical chart