what is google earth ?Google Earth is a virtual globe program that is actually called Earth Viewer, and was created by Keyhole, Inc. The program charted the earth from the superimposition of images collected from satellites mapping, aerial photography and GIS 3D globe. Available in three different licenses: Google Earth, a free version with limited functionality; Google Earth Plus ($ 20), which has extra features; and Google Earth Pro ($ 400 per year), which is used for commercial use. Originally known as Earth Viewer, Google Earth was developed by Keyhole, Inc, a company acquired by Google in 2004 this product, then was renamed Google Earth in 2005, and is now available for personal computers running Microsoft Windows 2000, XP , or Vista, Mac OS X 10.3.9 and above, Linux (released on June 12, 2006), and FreeBSD. In addition to releasing an updated Keyhole based client, Google also added the imagery from the Earth database to their web based mapping software. The launch of Google Earth caused an improvement over the media coverage on virtual globes between 2005 and 2006, attracted public attention on geospatial technologies and applications.
The viewer shows the house, the color of the car, and even the shadows of people and street signs. Resolutions are available depending on the destination, but most areas (except for some islands) is covered in the 15-meter resolution. Las Vegas, Nevada and Cambridge, Massachusetts has the highest resolution, at a height of 15 cm (6 inches). Google Earth WHERE users search for addresses (for some countries), enter coordinates, or use the mouse to find the location.
Google Earth also has digital elevation model data (DEM) data collected by the Shuttle Radar Topography Mission of NASA. This means one can see the Grand Canyon or Mount Everest in three dimensions, instead of 2D sites / programs other maps. Since November 2006, the 3D views of the mountains, including Mount Everest, have been used with the use of DEM data to meet the gate in SRTM coverage.
Many people who use this app to add their own data and making them available through various sources, such as BBS or blog. Google Earth is able to show all images of Earth's surface. and is also a Web Map Service client. Google Earth supports managing three-dimensional Geospatial data through Keyhole Markup Language (KML).
Google Earth has the ability to show buildings and structures (such as bridges) 3D, which consist of users' submissions using SketchUp, a 3D modeling program. The old version of Google Earth (before Version 4), 3D buildings were limited to a few cities, and had poorer rendering with no textures. Many buildings and structures around the world have detailed 3D; including (but not limited to) in the United States, United Kingdom, Ireland, India, Japan, Germany, Canada, Pakistan and the cities, Amsterdam and Alexandria. In August 2007, Hamburg became the first city entirely shown in 3D, including textures such as facade. Three-dimensional appearance that is available for some buildings and structures around the world via Google's 3D Warehouse and other websites.