World Wind, an open source 3D interactive world viewer, was created by NASAâ??„?s Learning Technologies project, and released in mid-2004. It is now developed by NASA staff and open source community developers.World Wind allows any user to zoom from outer space into any place on Earth. World Wind uses satellite imagery and elevation data to allow users to experience Earth terrain in visually rich 3D, just as if they were really there. Virtually visit anyplace in the world. Look across the Andes, into the Grand Canyon, over the Alps or along the African Sahara