QUESTION

a line of levels 9.36 km is run to check the elevation of bm2 which has been found to be 31.388 meters with bm1 of elevation at sea level (reference datum). backsight and foresight distances are consistently 110 m and 70 m respectively. determine the corrected elevation of bm2 considering the effect of curvature and refraction correction.

Public Answer

8QC1W1 The First Answerer