Ocean drainage basin map of Asia Robert Szucs / Grasshopper Geography The new maps show how interconnected the world’s waterways are—how far-flung rivers from different continents eventually ...

The Pacific Ocean is the largest of the Earth's ocean basins, according to the National Ocean Service. It contains more than half of the free water on Earth, spanning around 63 million square miles.

The majority of Szucs’ maps depict expanses of land sectioned off by watersheds, the areas of land that comprise the drainage systems channeling rainwater from creeks to rivers to oceans.

Drainage, structural and ocean are the major types of basins. As for ocean basins, the Pacific Ocean is the world's largest, covering 63 million square miles, with deep depths averaging 13,000 feet.

National Geographic, one of the world’s pre-eminent and most visible mapmaking groups, has officially decreed the existence of a fifth ocean. Called the Southern Ocean, it’s the body of water ...