14 An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 352.2552m and 924.5565m respectively. If point O is at elevation 621.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction.

Structural Analysis
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Chapter2: Loads On Structures
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14 An instrument is set-up at point M and vertical angles are observed at N (-21°15')
and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal
distance of NM and NO are 352.2552m and 924.5565m respectively. If point O is at
elevation 621.6453m,
a. Determine the elevation of N neglecting the effects of curvature and refraction.
b. Determine the elevation of N making due allowance for curvature and refraction.
Transcribed Image Text:14 An instrument is set-up at point M and vertical angles are observed at N (-21°15') and O (+33°45'). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 352.2552m and 924.5565m respectively. If point O is at elevation 621.6453m, a. Determine the elevation of N neglecting the effects of curvature and refraction. b. Determine the elevation of N making due allowance for curvature and refraction.
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