Three-Dimensional Densification for Local Control

In recent years local engineers and surveyors have often asked for precisely determined control points at a spacing of 2-km to 3-km. To fulfill this demand, a study is being conducted at the Univ. of Illinois at Urbana so as to densify the existing first-order geodetic control. Considered for this study are various configurations and electronic instrumentation that will provide a method for rapid field work, thus reducing the total project cost tremendously without reducing the desired high accuracy. Results of a new configuration, called the Central-Point Configuration, are more accurate than desired, both for horizontal and vertical control. This study will be of importance to all states and counties that need to establish a densified control net of higher accuracy with limited funds.