GATE CE 2015 Set 2 — Question 35
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Geomatics Engineering → Levelling → Curvature & Refraction Correction
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Question
The combined correction due to curvature and refraction (in m) for a distance of 1 km on the surface of Earth is:
Correct answer
(A) 0.0673
Solution
The combined correction () for curvature and refraction in surveying is calculated using the formula:where is the horizontal distance in kilometers and is the correction in meters.For a distance km:Therefore, the correct option is (A).
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