(Trilateration): In a trilateration network one of the triangles has the following data: AB = 600m, BC = 800m, CA = 1000. If the true bearing of side AB is N25030'E, determine the bearing of side BC. Select the correct response: S 64°30' W S 64°30' E N 64°30' W N 64°30' E

Q: Determine the deflections of point C and E. Knowing E=2.0 X 105 MPa, 1,=6560 cm 1,=12430 cm^4.

A: E=2.0 X 105 MPa, I1=6560 cm4 I2=12430 cm4 To find: The deflection at the point C and E

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.