A levelling survey was carried out between two benchmarks, T1 (height: 500.000m) and T2 (height: 502.000m). Readings on

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A Levelling Survey Was Carried Out Between Two Benchmarks T1 Height 500 000m And T2 Height 502 000m Readings On 1 (135.26 KiB) Viewed 20 times

A levelling survey was carried out between two benchmarks, T1 (height: 500.000m) and T2 (height: 502.000m). Readings on the surveying staff were booked as shown in Table B2. (a) Reduce the heights of all surveyed points using the Height of Collimation OR the Rise and Fall method. [10 marks] (b) What is the number of change points in this levelling survey? Also mention the change point names. [2 marks] (c) What is the closing error of the levelling survey? [3 marks] (d) Adjust the reduced heights obtained from (a). [5 marks] (e) Create a sketch of the ground profile along the levelling survey and indicate the approximate set-up locations of the level along with the associated collimation lines. On each point, draw a surveying staff and indicate the relevant readings of Table B2. A relative scale is acceptable for this question. No need for an accurate, scale drawing. [10 marks] Table B2 B/S I/S FIS 1.849 1.532 可可四四四四乃 Point name Chainage (m) 0.000 50.000 P2 100.000 150.000 200.000 250.000 T2 300.000 P3 1.095 1.956 2.007 0.622 1.743 1.897 0.266