World Wind is open-source software, developed by the National Aeronautics and Space Administration (NASA) that allows the user to zoom from satellite altitude into any place on earth. Leveraging Landsat satellite imagery and Shuttle Radar Topography Mission (SRTM) data, World Wind lets the user experience any part of earth's terrain in visually rich 3D form, just as if one were really there. For instance, one can use World Wind to zoom in on the Himalayas or Mount Saint Helens. The combination of Landsat 7 imagery with SRTM data allows World Wind to display dramatic views of the earth at eye level. Users can literally fly across the world in any direction.
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