<Tr> <Th> License </Th> <Td> Freeware </Td> </Tr> <Tr> <Th> Website </Th> <Td> earth.google.com </Td> </Tr> <P> Google Earth is a computer program that renders a 3D representation of Earth based on satellite imagery . The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles . Users can explore the globe by entering addresses and coordinates, or by using a keyboard or mouse . The program can also be downloaded on a smartphone or tablet, using a touch screen or stylus to navigate . Users may use the program to add their own data using Keyhole Markup Language and upload them through various sources, such as forums or blogs . Google Earth is able to show various kinds of images overlaid on the surface of the earth and is also a Web Map Service client . </P> <P> In addition to Earth navigation, Google Earth provides a series of other tools through the desktop application . Additional globes for the Moon and Mars are available, as well as a tool for viewing the night sky . A flight simulator game is also included . Other features allow users to view photos from various places uploaded to Panoramio, information provided by Wikipedia on some locations, and Street View imagery . The web - based version of Google Earth also includes Voyager, a feature that periodically adds in - program tours, often presented by scientists and documentarians . </P>

How does google earth act as an earth viewer
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