4. When fields take on the pattern seen in the picture here, what kind of survey system has been used? C. JOnes R. oT K Veions A Sritn J Baker Vaanig on S. Wiare O Long Lot Metes and Bounds Township and Range Rectangular Surveys O Irregular Surveys

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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.