Who was improved map making aided circumnavigation of the globe?

Improved map-making during the Age of Exploration, particularly through advancements in cartography and navigation techniques, greatly aided the circumnavigation of the globe. Notable figures like Gerardus Mercator developed more accurate maps, which allowed sailors to navigate more effectively. Innovations such as the astrolabe and later the sextant also enhanced navigational precision. These developments enabled explorers like Ferdinand Magellan to successfully complete their voyages around the world.