Computer · Surveying
Which of the following expressions is correct to calculate the combined correction for curvature and refraction (C) in levelling? Here, d is the distance sighted measured in km.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1C = 0.03456 d2 m
- 2C = 0.01121 d2 m
- 3C = 0.06728 d2 m✓
- 4C = 0.07849 d2 m
Correct answer
C = 0.06728 d2 m
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