The observed altitude of B-ursae Minoris at lower and upper culminations are 29°58′15" and 60°453"   The observed altitude of B-ursae Minoris at lower and upper culminations are 29°58′15" and 60°453"   Find the latitude of the place of observation assuming the correction for refraction to be equal to 57" x tangent of apparent zenith distance?   do it fast dont give wrong solution

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Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.