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Q: Which of the following options correctly define the subsidiary station?
  • A. Station where observation are not made, but the angles at the station are used in triangulation series
  • B. Control points of triangulation network
  • C. Points to provide additional rays to intersected points
  • D. Points close to main station to avoid intervening
Correct Answer: Option C - Tie station or subsidiary station–Tie station is a station on a survey line joining two main stations. These are helpful in locating the interior details of the area to be surveyed. Points to provide additional rays to intersected points.
C. Tie station or subsidiary station–Tie station is a station on a survey line joining two main stations. These are helpful in locating the interior details of the area to be surveyed. Points to provide additional rays to intersected points.

Explanations:

Tie station or subsidiary station–Tie station is a station on a survey line joining two main stations. These are helpful in locating the interior details of the area to be surveyed. Points to provide additional rays to intersected points.