Google says, "Based on Keyhole technology, Google Earth enables users to fly from space to street level views to find geographic information and explore places around the world."
Google Earth Offers New Local Search Experience
Google Launches Google Earth - Free 3D Mapping and Search Product
From Nick Greene, for About.com
Dive from space to practically any address you choose. Want to see what your house looks like in a satellite image? Now, you have the chance with Google's free 3D mapping and search product, Google Earth. Google Inc. announced the launch of Google Earth in June of 2005. Google Earth is a satellite imagery-based mapping product that combines 3D buildings and terrain with mapping capability and Google search.
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