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Ocean Currents and Climate There are two type of Ocean Currents: 1. Surface Currents -- Surface Circulation These waters make up about 10% of all the water in the ocean. These waters are the upper 400 meters of the ocean.
Why are there New maps and Old Maps CCBYSA? Well, Opentstreetmap changed their license in July 2012. As there needed to be quite a lot of contributions to be deleted, the state of the maps was for some time quite troublesome.
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