121. Triangulation surveys are carried out for providing
122. The point at which sun's declination changes from north to south, is known as
123. Contour interval is
124. If ‘f’ is the focal length of the camera lens and ‘θ’ is the angle of tilt, the distance of the plumb point from the principal point will be
125. Pick up the incorrect statement from the following. In a spherical triangle
126. If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be
127. The process of turning the telescope about the vertical axis in horizontal plane is known as
128. For mapping any country
129. In the prismatic compass
130. If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is
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