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NASA World Wind lets you zoom from satellite altitude into any place on Earth. Leveraging Landsat satellite imagery and Shuttle Radar Topography Mission data, World Wind lets you experience Earth terrain in visually rich 3D, just as if you were really there.

Virtually visit any place in the world. Look across the Andes, into the Grand Canyon, over the Alps, or along the African Sahara.
Features include 3D Engine, Blue Marble, Landsat 7, SRTM, MODIS, GLOBE, Landmark Set.

For Windows 2000/XP. Vista reported to work but has problems, UAC needs to be turned off for install and during use.