c) An engineer sets up a total station around three stations in a loop and measu

Question

c) An engineer sets up a total station around three stations in a loop and measures Zenith Angle (ZA), Slope Distance (SD), Instrument Height (HI) and Target Height (HT). The data collected from field has been tabulated below. The RL of Station 1 is 780.000m, calculate the vertical misclose and reduced Level (RL) of Stations 2, and 3. Show all workings From ToZenith Angle Mean SlopeHI (m)HT Ah RL STN (ZA) ZA Distance (SD) 780.000 1 2 151.254 1.6191.580 FL 900 26'28" FR 269° 33'36" 2 100.6621.5801.634 3FL90° 20'39" FR 269° 39'13" 180.7811.634 1.619 FL 890 26'25” FR 2700 33,31”

Explanation / Answer

The answer for the asked portions are shown below :

Stations RL(m) h (m) = (HI- HT) 1 780.000 1.619-1.580=0.39 2 (780-(1.619-1.580) )=779.961 1.580-1.634= -0.54 3 780-(1.580-1.634) = 780.054 1.634-1.619=0.15

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