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Trigonometric levelling is also called:

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in Basic Civil Engineering by (111k points)
Trigonometric levelling is also called:

(a) Indirect levelling

(b) Differential levelling

(c) Fly levelling

(d) Profile levelling

I have been asked this question in an interview.

This intriguing question originated from Methods of Levelling in portion Basic Surveying of Basic Civil Engineering

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Best answer
Correct choice is (a) Indirect levelling

Easiest explanation: In trigonometric levelling, the horizontal distance and vertical angle are measured from the station to the object. It uses trigonometric relations to compute the vertical height of a point.

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