Chapter:

Tacheometry-Surveying-

Permissible Error in surveying

  • Permissible error in a single horizontal distance should be within 1 in 500, and vertical distance should not exceed 0.1m.
  • In open traverse, average error should not exceed 1 in 600 to 1 in 850.
  • For sights upto 120m, an accuracy of `1/3000` to `1/10000` is must.
  • Closing error in stadia traverse > `0.055 root(P)`, `P` is the perimeter of the traverse.
  • Error in closing for elevation varies from `0.08 root(K)` on level ground to `0.25 root(K)` on hilly ground, where `K=` distance in km.
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