Accuracy of Elevation in Google Earth in Thailand
Keywords:
Google earth, Accuracy, CheckpointAbstract
A map shows information in both horizontal and vertical. Vertical data on a map are as important and useful as horizontal data. Google Earth is one of the most popular software and it can provide earth surface elevations at any point on earth. This research conducts a study on the vertical accuracy of Google Earth in Thailand by comparing 121,624 checkpoint elevations read from Google Earth with corresponding elevations read from Orthophoto 1:4,000 scale of the Ministry of Agriculture and Cooperatives. The results reveal an average error of 7.0 meters with a standard deviation of 8.1 meters. The users can view the checkpoint location map together with the check result of each individual checkpoint by following the Google Maps link created in this project.
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