A series of benchmarks are established for a new construction project by tying into the local
city benchmark network, giving the elevations as shown in Figure 4.34. The distances between the
stations are provided in the figure. The published elevations of BM 1 and BM 3 are 1,320.28 m
and 1,330.56 m, respectively. Note that the survey crew checks back into the benchmarks with
elevations of 1320.39 m and 1,329.91 m. Adjust the elevations of the BMs in the circuit.
(10 marks)

 

Transcribed Image Text:

BM 111 Elev. 1320.39 (1320.28) 0.6 mi 0.4 mi BM 6 1333.67 0.6 mi BM 5 1327.86 BM 1 1325.15 0.3 mi 13 0.6 mi 0.25 mi BM 4 1329. 01 BM 2 1328.94 0.25 mi BM 3 1331.55 BM 111 Elev. 1320.39 (1320.28) 0.6 mi 0.4 mi BM 6 1333.67 0.6 mi BM 5 1327.86 BM 1 1325.15 0.3 mi 13 0.6 mi 0.25 mi BM 4 1329. 01 BM 2 1328.94 0.25 mi BM 3 1331.55