How Google Earth Works?
Ever since Google Earth has been introduced to the Internet users there have been as many as 200 million downloads of the products. People have been using it for many different purposes and reaping the benefits of this unique software. Google Earth can be fun for people who use it for finding out their locations of their favorite topic. Google earth is an extraordinary mapping system but very few know how this whole gigantic system works. An insight into the internal mechanism of Google earth will make you more efficient in using this system, which has immense potential.
Have you ever thought how the whole earth and its infinite content is stored in the system How you can zoom in the location you are looking for? If you are really interested then read what follows. The reason behind the zoom in from space to the particular location is Data Transfer. If you want to have a one-meter resolution image of the entire world on the Internet and if you are using 10-megabit-per-second Internet connection it would take you an awesome 69 years and if you have 56K modem for this operation then it would take only 12,400 years for the image on the Internet. To reduce the amount of data that has to be transmitted on the Internet Google earth gauges the sphere of the planet's surface with a polygon made up of flat tiles. The farther is your viewpoint from the surface fewer tiles are necessary to have an effect of roundness and the resolution of these tiles can be lower as well. As you focus in on any location the computer divides every tile into small sub tiles and the exploded tile has a high resolution and moulds the Polygons in balls. This process goes on as you zoom in.
This way the Google earth mechanism only has to download high-resolution data when the viewer is zooming towards it. Google earth also has another intelligent mechanism to have speedy display It uses a disk cache, in this disk cache are stored the places the user has visited and all this goes in on your hard drive. If the user wishes to go to these places or locations again. The whole process is not repeated not even the software needs to be downloaded again. The disk cache quickly recalls the stored images and the user can view the image. However the tiling mechanism was also used by climate modellers but when it was used with Google it gave amazing results simply because Google has really good software and Google’s gigantic supercomputing platform changed the use of tiling technology. Google Earth uses the 1:1 scale of the globe with the scale of the fully zoomed map. This renders the effect of looking at the sphere only. Google earth also uses the VWorld technology for their images. Google earth, Google, technology, images,
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