To get a real idea of the accuracy the point extraction should be carried out covering a wide area. The accuracy of the point can be brought down to approximately 0.5m in X direction by adding -4.27m and approximately to 0.8m by adding -2.4m in y direction.Īpplication of this error in other areas can change due to the projection errors in Google earth. This shows that Google Earth is more than enough for geo-referencing low-resolution image that has 25m-30m resolution. Error in picking actual point in Google Earth has been neglected.
Street View stitches together billions of panoramic images to provide a virtual representation of our surroundings on Google Maps. GPS observations has been corrected using DGPS techniques. Bringing your map to life, one image at a time. Coordinates for the Google Earth x,y columns in the following tables has be picked keeping "Eye alt ≈300m" to avoid errors in pin-pointing position on Google Earth. GPS observations were carried at GIC building, AIT Pool, road junctions, and basketball court as shown below. Our project carried out around AIT was to simply find the accuracy of, point coordinates extracted for Google Earth with DGPS coordinates.
However, the accuracy of Google Earth is not defined. Google earth is widely used, when working with geo spatial data for extracting point data and geo-referencing low resolution image. I good source that I can point to for you to reference would be Google Earth For Satellite Image Geo-referencing
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