Computer · Surveying
To set a right angle on a survey line, the instrument is held on:
- 1The nearest tie station and placed at an intervisible distance.
- 2The main station of the survey line and away from the point at an intervisible distance.
- 3The line with its centre on the point at which the perpendicular is erected.✓
- 4The tangent of the line with its centre at the mid-distance and parallel to the right angle.
Correct answer
The line with its centre on the point at which the perpendicular is erected.
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