How to take change point in surveying?

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Asked: December 26, 20212021-12-26T19:44:13+05:30 2021-12-26T19:44:13+05:30In: Surveying

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Mohd Mujtaba · Accepted Answer · 2022-04-06T22:01:06+05:30

A Change point is defined as a point when shifting of level from one point to another point, that point is known as change point.

Taking of change point

In levelling, after setting up of instrument first take back sight (B.S) reading on bench mark or TBM.
Then take intermediate sight (I.S).
Final possible reading from the station is fore sight (F.S).
When staff is so far, then we need to take change point (C.P).
Shift the instrument on another possible location.
Take the back sight (B.S) reading on last staff.
It is a point on which fore sight (F.S) and back sight (B.S) are taken.