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

Q: A total station instrument occupies control point 20 and takes a BS to CP 22. The Azimuth from 20 -…

A: The backsight of CP-20 to 22 = 215°55'00'' Easting and northing of CP-20 = 8000,13000 The included…

Q: 6-12. What is the angular misclosure of the closed traverse below? Ans.: A (a.) (b.) (C.) (d.) B85°…

A:

Q: STATION DIRECT DOUBLE MEAN REMARKS DEFL. DEFL. DEFL. Azimuth 111 - 112 = 121° 21' 111 147° 01' 293°…

A: Station Direct Double Mean Remark 111 147°1' 293°59' 147° (147°1'+293°59')/3 112 116°11' 232°22'…

Q: From the wind load design perspective, why do inclined roofs are preferred over flat roofs in…

A: Inclined roofs are preferred over flat roofs in low rise buildings because of the following reasons:

Q: An instrument was set up over station 1, and sights between points A and C were taken. The…

A:

Q: STATION H.I H. ANGLE H. DIST V. DIST ELEV. ft ft ft Instrument station #1 (between BM and station…

A: Height of the instrument =elevation +vertical height and   elevation =height  of indtrument -vetical…

Q: Convert the following to azimuth:  N64°21’18’’W S45°26’42’’E S79°42’16’’W

A: Convert the following to azimuth:  Part (a). N64°21’18’’W This is in quadrant 4. Azimuth  =   360°…

Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.