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Orthogonal Trajectories

Curvature cor...

Question

Curvature correction to a staff reading in a differential levelling survey is

A

Always additive

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B

Always zero

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C

Always subtractive

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D

Dependent on latitude

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Solution

The correct option is C Always subtractive
Correction for curvature is always subtractive.

$Curvature correction, B C = 0.0785 D^{2}$

Where D = Horizontal distance between A and B

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