Whose map making system do we use today?

Today, we primarily use the geographic coordinate system based on the work of various cartographers and geographers, with significant contributions from figures like Gerardus Mercator, whose projections are widely used for navigation. Additionally, modern mapping relies heavily on satellite data and Geographic Information Systems (GIS) technologies, which integrate various data sources to create accurate maps. The Global Positioning System (GPS) also plays a crucial role in real-time location tracking and mapping.