Tacheometry is a surveying method used to determine the distances and elevations of points on the ground without the need for a direct measurement of distance. It is a technique that combines the principles of trigonometry with the use of instruments like theodolites or total stations. In tacheometry, the surveyor typically measures angles and, using a fitted scale or an equation, can obtain horizontal distances based on the angles measured and the height of the instrument above the ground (the instrument's height).
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