Google Earth

Google Earth is a virtual globe, map and geographical information program. It maps the Earth by the superimposition of images obtained from satellite imagery, aerial photography and GIS onto a 3D globe. For some parts of the surface of the Earth 3D images of terrain and buildings are available. Google Earth uses digital elevation data collected by NASA's Shuttle Radar Topography Mission. Since November 2006, the 3D views of many mountains, including Mount Everest, have been improved by the use of supplementary DEM data to fill the gaps in SRTM coverage.Users of Google Earth are able to export tracks, in the form of KML files to TRACKSEDGE to create their own personal tracks for display.