Provide Complete Solution The table below are the observation of a three-wire leveling from BM1 to BM2. If the elevation of BM 1 is 127.133m and the observation of BM2 is 121.711, compute for the elevations of TP1 to TP5. (The given observation of BM 2 is the "true value", it is expected to be different with the calculated value of BM 2) Assume K= 100 and C = 0 for determining horizontal distance from BS and FS readings STATION BS BS(Dist) HI FS FS(Dist) ELEV 1.112 BM1 1.256 127.133 1.4 0.952 1.742 TP1 1.116 1.886 1.28 2.03 1.1 1.363 ТР2 1.228 1.527 1.356 1.691 1.023 2.118 ТРЗ 1.189 2.246 1.355 2.374 0.886 1.851 ТР4 1.07 2.017 1.254 2.183 1.687 2.472 ТР5 1.831 2.656 1.975 2.84 2.621 True: BM2 2.765 121.711m 2.909

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Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.