The prime vertical passes through
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The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is
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The principal plane contains
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Latitude of the observer's position is equal to altitude of
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The parallax equation is applicable to entire overlap of the photographs only if parallax is measured
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If the length of a chain is found to be short on testing, it can be adjusted by
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In the double application of principle of reversion, the apparent error is
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The solar tidal force divided by lunar tidal force is
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Closed contours, with higher value inwards, represent a
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The average eye base is assumed as
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Longitudes are measured from 0° to
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If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer then the hour angle of the star at elongation is given by
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If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer, then the azimuth of the star at elongation is given by
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The altitude of a circumpolar star is maximum when it is
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Rotation of the camera at exposure about its vertical axis, is known as
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The angle between the observer's meridian and declination circle of a heavenly body, is known as
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A metallic tape is made of
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If S is the sum of three angles of a spherical triangle, the spherical excess equals
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The suitable contour interval for a map with scale 1 : 10000 is
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Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?
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