51. Benchmark is established by
52. The normal longitudinal overlap is generally kept
53. The difference of parallax for a given difference in elevation is independent of
54. If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is
55. Latitude of a place is the angular distance from
56. If $$\alpha $$, H, A and $$\delta $$ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude $$\lambda $$, the following relation holds good
57. The latitude (λ) of a place and the altitude (α) of the pole are related by
58. The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as
59. Pick up the incorrect statement from the following. High oblique photographs
60. Parallax bar measures
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