If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1 : 50,000 , will be
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Which of the following methods of contouring is most suitable for a hilly terrain?
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The size of a plane table is
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The angle between the plane of the equator and the plane of the ecliptic, is known as obliquity of the ecliptic and its value is
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For a tacheometer the additive and multi-plying constants are respectively
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From the principal point the horizon point lies on the principal line at a distance of
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If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is
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Overturning of vehicles on a curve can be avoided by using
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The error due to eccentricity of inner and outer axes can be eliminated by
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The Polaris remains below horizon at
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Three point problem can be solved by
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The zenith is the point on the celestial sphere
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The allowable length of an offset depends upon the
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The great circle whose plane is perpendicular to the axis of rotation of the earth, is called
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The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called
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To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30,000, with a camera of 30 cm focal length, the flying height is
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The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height ‘H’ is 100 m. If mean photo base is 95.2 mm, the flying height is
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The correction for parallax, is
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The Polaris describes a small circle round the pole whose radius is approximately
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Sensitiveness of a level tube is designated by
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