Line Length(m) Azimuth DA 500 2100 DC 2000 450 СВ 1000 270° АВ ? ?

P1

Lines of levels were run requiring n instrument setups. If the rod reading for each backsight and foresight has a standard deviation s, what is the standard deviation in each of the following level lines?(a) n = 15, s = ±0.015 ft(b) n = 28, s = ±5 mm

11. Stations E, C, D are three triangulation shore signals whose positions were determined by the angle W = 146°30' (interior angle ACD). The sides EC is 1200m and the side CD is 965m. A sounding at F was taken from a boat and the angle EFC was observed to be 28 15' while angle CFD was determined to be 22°30'. Points ECDF (clockwise) formed a quadrilateral and line CF divides this quadrilateral into two triangles. Hint: Plot the four stations starting at point E. The bearing of line CE is N 30°00' E. What is the value of iangle X (interior angle CEF)? a) 85°34' 30 23' c) 78°45' 12. In item number 11, the value of Y (interior angle CDF) in nearest to 82 22 b) 65°34' c) 76°40' 13. In item number 11, the length of line EF is nearest to a) 2750.46m F 2402.39m c) 2506.89m 14. In item number 11, the length of line FD is nearest to 14-15, thank you a) 2634.60m b) 2467.79m c) 2437.26m 15. In item number 11, the length of line CF is nearest to a) 2499.32m b) 2889.45m c) 2678.23m