Question Question: if you know that, a Loop levelling started and ended on known benchmarks (BM 1073 and BM 1074) as shown below. There are 3 instrument locations (L1, L2, L3) and 2 change points (D, G). Additionally, there are 5 intermediate sight points (A, B, C, E, F). The staff readings are presented on the sketch below. The elevation of BM 1073 is equal to 15.452m. Calculate the reduced level of all unknown points (A, B, C, D, E, F, G, and BM 1074) using the Height of the instrument method and the Rise and Fall method? Present your work in two separate tables. B F 0.9070 AQ 0.87X E Q0.808 0.765 2.005 1.322 1.805 1.904 1.090 L2 G 2.355 BM 1073 15.452m L, 1.411 L3 C BM 1074

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Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.