Computer · Surveying
Identify the correct statement about a 'turning point' (change point) in a levelling operation.
- 1It is a point on which both a foresight and a backsight are taken.✓
- 2It is a point where only a backsight is taken during levelling.
- 3It is a fixed permanent benchmark with known elevation used throughout the survey.
- 4It is a point where only a foresight is taken during levelling.
Correct answer
It is a point on which both a foresight and a backsight are taken.
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