Google Earth version 4 has now been enhanced with even more-realistic looking 3D models of terrain and buildings.

On other hand, Microsoft is now adding a Virtual Earth better aerial and satellite images of United States from GlobeXplorer LLC. The deal further improvises by having Microsoft's Live Search Maps by Virtual Earth.

The interesting part is Google Earth and Virtual Earth both are desktop applications offering download at no charge. Both have search features for finding and mapping locations, and accessing driving instructions. The service also lets users cover information about locations, saving maps, and option to e-mail others.

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