Discussion :: Advanced Surveying
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Pick up the correct statement from the following :
A.
the vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane.
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B.
the angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star.
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C.
the complement of the altitude of star is called the zenith distance of the star.
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D.
all the above.
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