Google Earth: Resolution and Accuracy
Google earth is a virtual Globe. Google Earth is a 3D software model or it is the virtual representation of the globe. The user can move freely around the globe by changing the viewing angle and position. There are a number of advantages of the virtual globe over the conventional globe. This is because the virtual globe can display the different views of the earth surface. The views can be the geographical views, roads, 3D buildings, highways, International borders, etc. Apart from this it also displays the quantities such as population, temperature of a particular location, etc. The whole Globe is displayed in totality by the number of satellite images taken for those locations.
Google these days has gained a lot of importance in almost every field any it be engineering, medical, commerce, arts, etc. To cope up with this and to help the users in various ways Google Earth should definitely think over the Resolution and accuracy part of the images and the information provided. It is used as a data base by many users. Thus it should be important that the data that is provided is accurate and has good resolution. There are further application in Google earth namely the Google earth plus, Google earth professional, Google Earth pro, etc. where every application has its distinct advantages.
When it comes to resolution, the images that are captured are not always of a particular fixed resolution. The resolution per pixel always varies. Like for the oceans the resolution is much lower than the resolution incase of 3D buildings, parks, International borders, mountains, etc. In case of land images the satellite resolution is about 15m per pixel. When it is very much essential to get the minute details with further resolution, than in that case, the aircraft images are taken. These aircraft images are taken at a much higher resolution. The resolution depends on how important a particular place is for the general users. Like there are a number of islands where, satellite images are taken with a much low resolution.
There are problems in the images due to many reasons. Like when the image of the land area near the mountains is to be taken than there are problems like shadow. When image from some height is to be taken, than in that case, the shadow area may not be visible. Also in some cases the image captured can be blurred. This is because there are chances of clouds in between the target and the satellite.
In case of accuracy, when initially the Google Earth was started there were some inaccuracies in locating names of a particular road and a minor of some other inaccuracies. But slowly they have tried to improve on all this and are trying to increase the accuracy of data that is provided by Google Earth. The main reason behind the inaccuracies is the large data that Google has with it. For example the data for a particular area involves a number of satellite images for the same area. Further the best possible image out of it has to be selected. This is then processed by the machines and human beings and then the final image is posted on Google Earth. Doing such a long process there are some errors that are bound to occur. But still Google Earth is trying its best to improve on this. There are a number of inaccuracies that are worked upon and changes are done.
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