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​Geodesy: one of Earth Sciences, which specializes in identifying and measuring the size and shape of the globe as well as calculate the points positions with high accuracy, as well as to measure and describe Earth's gravitational field and Tgieradtha.
Land Survey: known to science, art and technology to make the necessary measurements to determine the relative positions of a number of industrial monuments of nature or whether above, on or below the surface of the earth, then show it by the way the numbers or graphics.​


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