How did Diego Ribero’s 1529 world chart show new information about the Pacific Ocean?

Diego Ribero’s 1529 world chart was significant because it was the first to depict the vast extent of the Pacific Ocean.1

As a cosmographer to the king of Spain, Ribero was able to incorporate critical new geographic data provided by the survivors of Ferdinand Magellan’s circumnavigation, who had returned to Seville in 1522. This firsthand information allowed him to accurately represent the immense scale of the ocean, which had previously been poorly understood by European cartographers.1