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Google Earth is a virtual globe, map and geographical information program that was originally called EarthViewer 3D, and was created byKeyhole, Inc, a Central Intelligence Agency (CIA) funded company acquired by Google in 2004 (see In-Q-Tel). It maps the Earth by thesuperimposition of images obtained from satellite imagery, aerial photography and GIS 3D globe. It was available under three different licenses, two currently: Google Earth, a free version with limited function; Google Earth Plus (discontinued),[4][5] which included additional features; and Google Earth Pro ($399 per year), which is intended for commercial use.[6]
The product, re-released as Google Earth in 2005, is currently available for use on personal computers running Windows 2000 and above,Mac OS X 10.3.9 and above, Linux kernel: 2.6 or later (released on June 12, 2006), and FreeBSD. Google Earth is also available as abrowser plugin which was released on May 28, 2008.[7] It was also made available for mobile viewers on the iPhone OS on October 28, 2008, as a free download from the App Store, and is available to Android users as a free app in the Google Play store. In addition to releasing an updated Keyhole based client, Google also added the imagery from the Earth database to their web-based mapping software,Google Maps. The release of Google Earth in June 2005 to the public caused a more than tenfold increase in media coverage on virtual globes between 2004 and 2005,[8] driving public interest in geospatial technologies and applications. As of October 2011, Google Earth has been downloaded more than a billion times.
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