Civil Engineering :: Surveying
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While surveying a plot of land by plane tabling, the field observations
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If α and β be the elevations of two objects A and B respectively, θ be the angle observed by a sextant. The correct horizontal angle is
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If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on
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If the length of a chain line along a slope of θ° is l, the required slope correction is
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The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly
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The area of any irregular figure of the plotted map is measured with
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Probable accidental error in precise levelling as recommended by International Geodetic Association, should not exceed
(where k is in kilometers.) -
The curvature of the earth's surface, is taken into account only if the extent of survey is more than
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