Satellite images of Google Earth
Google earth as we all know is a software that helps the user to view the geographical locations sitting at one place. The user can view the 3D buildings, terrains, mountains, roads, International borders, etc by the use of Google Earth. There is a database of the images in Google earth. Now you may think that how old these images are?, how they are taken? How they are processed? Why some part of the Globe shows a blurred imagery? Why some part is crystal clear? Who and how frequently update these images.
Source of Imagery: There are a number of people who believe that the images obtained by the Google earth, has only one source and that is the satellite. But this is not true. There are a number of other sources through which the Google earth collects the images. These are any possible ways that can take the camera above the earth surface. They mainly include the airplanes, the hot air balloons, the model airplanes, even the kites. Initially they used to collect the images with the help of Airplanes. The only thing that they used to do is to place the camera in the belly of an air plane that used to fly at the height of about 15,000 to 30,000 feet above the earth surface. They obtain the overlapped images of the earth surface that are parallel to each other. These overlapped images can improve the quality of the final imagery. The overlapped images can give the missing details of the other images of that same area.
There is one more constraint in obtaining a perfect image for Google Earth. That is the varying shape of the earth. The varying shape of the earth results in a distorted view. But the overlapped images that are obtained can solve this problem too. They can improve the quality of these images also.
Now after obtaining images from different sources the next thing that has to be done is to process the obtained images. The best of the images are chosen. All the images are studied thoroughly to get the best of every image. Every image adds something to the final imagery that is placed on Google earth. In the processing stage the images that are taken are scanned with a scanner. The resolution of the scanner is about 1800 dots per inch. The digital imagery is taken through the series of stages. All the aspects related to color balancing, Warping etc are taken into consideration. After doing that the final image is loaded on Google earth.
After the images are obtained the information of each location is gathered. This information is taken from multiple sources like the commercial providers, local government agencies, public domain collections, private individuals, national and also international governments. Thus Google earth till date has collected a large data from these multiple sources. This data is also displayed on the screen of Google Earth.
This is how Google earth can make you view the buildings, schools, parks, amusement parks, 3D buildings, etc.
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Tags: Google Earth, Google Earth Tricks
