Atlantic Ocean, sea floor topography. Computer graphic of an Earth globe centred on the Atlantic Ocean, generated using satellite and mapping data. The land surface is represented with cloud-free satellite images in natural colours. Digital terrain and bathymetric data are used for the land and seabed contours. Ocean depths are colour-coded: light blue on the shallow continental shelves to darker blue for the deep trenches and abyssal plains. Down centre is the Mid-Atlantic Ridge. Surrounding the Atlantic are Europe, Africa, North America and South America. Seas include the Mediterranean and Caribbean. At top is the Arctic Ocean and Greenland.