Question: What error results if the curvature and refraction correction is neglected in trigonometric leveling for sights? (a) 3000 ft long (b) 500 m long (c)

What error results if the curvature and refraction correction is neglected in trigonometric leveling for sights?
(a) 3000 ft long
(b) 500 m long
(c) 5000 ft long

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