Define tacheometry. State the principle of tacheometry with sketch.

Define tacheometry. State the principle of tacheometry with sketch.
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Answer :

Tacheometry : It is the branch of angular surveying in which horizontal and vertical distances are determined from instrumental observations only, is known as tacheometry.


Principle of tacheometry : As the distance between instrument station and staff station increases, the staff intercept also increases; so that the ratio of horizontal distance to corresponding staff intercept remains constant as shown below in figure 3


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