Levelling: rise and fall booking in 3D

Pick a ground profile and the bench mark level. The staff readings are booked by the rise and fall method and checked.

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Questions students ask

How do you check a rise and fall booking?

ΣBS − ΣFS = ΣRise − ΣFall = last RL − first RL. All three must agree.

What is a change point?

A staff position read as a fore sight from one set-up and a back sight from the next, so the levelling can continue.

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