The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is
A. 5100 nautical miles
B. 5700 nautical miles
C. 120 nautical miles
D. 500 nautical miles
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The distance between the minor control point and the principal point should be equal to
A. Base line of the left photograph of stereo pair
B. Base line of the right photograph of stereo pair
C. Sum of the base lines of stereo pair
D. Mean of the base lines of the stereo pair
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The meridian of a place is
A. A great circle passing through the place and the poles
B. A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
C. A semi-circle which passes through the place and is terminated at the poles
D. An arc of the great circle which passes through the place and is perpendicular to the equator
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The coverage is least if photography is
A. High oblique
B. Low oblique
C. Vertical
D. None of these
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Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as
A. Swing
B. Tilt
C. Tip
D. None of these
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The principal line is the line joining the principal point and
A. Nadir
B. Isocenter
C. Perspective centre
D. None of these
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The product of the distances of plumb point and horizon point of a vertical photograph from its principal point, is
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A series of closely spaced contour lines represents a
A. steep slope
B. gentle slope
C. uniform slope
D. plane surface
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Places having same latitude
A. Lie on the parallel of the latitude
B. Are equidistant from the nearer pole
C. Are equidistant from both the poles
D. All the above
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The sun's declination remains north between
A. March 21 to June 21
B. June 21 to September 21
C. September 21 to December 21
D. Both (A) and (B) of above
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Benchmark is established by
A. hypsometry
B. barometric levelling
C. spirit levelling
D. trigonometrical levelling
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The normal longitudinal overlap is generally kept
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The difference of parallax for a given difference in elevation is independent of
A. Focal length of the camera
B. Overall size of the photo graphs
C. Percentage of overlap
D. All the above
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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
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Latitude of a place is the angular distance from
A. Greenwich to the place
B. Equator to the poles
C. Equator to the nearer pole
D. None of these
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If α , H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ , the following relation holds good
A. cos H = tan δ tan λ
B. sin α = sin δ sin λ
C. sin A = cos λ cos δ
D. All the above
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The latitude (λ) of a place and the altitude (α) of the pole are related by
A. λ = α
B. λ = 90° - α
C. λ = α - 90°
D. λ = 180° - α
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The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as
A. Isocenter
B. Principal point
C. Perspective centre
D. Plumb line
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Pick up the incorrect statement from the following. High oblique photographs
A. May have tilt up to 30°
B. May include the image of the horizon
C. May not include the image of the horizon
D. None of these
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Parallax bar measures
A. Parallax
B. Height
C. Parallax difference
D. Height difference
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