Question:

Which one of the following is not an objective of the triangulation survey?

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Triangulation is a control survey in which a network of well conditioned triangles is laid out, the angles are measured precisely and the lengths of all sides are computed from one or more measured baselines.
Updated On: Jun 16, 2026
  • Establishing accurate control for photogrammetric surveys of large areas
  • Determination of accurate locations of points in engineering works
  • Determination of earth's curvature correction
  • Detection of crustal movements
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The Correct Option is C

Solution and Explanation

Concept:
Triangulation is a control survey in which a network of well conditioned triangles is laid out, the angles are measured precisely and the lengths of all sides are computed from one or more measured baselines. Its purpose is to provide accurate horizontal control.

Step 1:
Recall the recognised objectives of triangulation: to establish accurate control for plane and geodetic surveys and for photogrammetric mapping of large areas, to fix accurate positions of points in engineering projects, and to monitor movements such as crustal or structural deformation.

Step 2:
Compare each option with these objectives. Options (1), (2) and (4) are standard objectives of triangulation. Determining the earth's curvature correction is a computational reduction applied in levelling and geodetic computations, not an objective of carrying out a triangulation survey.

Answer: Option (3) — Determination of earth's curvature correction.
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