Adjust conventional Horizontal and Vertical Control Network
Field surveys for Horizontal and Vertical Control obtained by conventional methods also require adjustments. Horizontal control networks are based upon angle measurements and distance measurements using our highly sophisticated Trimble S6 robotic total station survey equipment and Trimble TSC3 data collection devices. The Trimble S6 robotic total station has the ability to measure angles to plus or minus 3 seconds of accuracy. The distances measured by the Trimble S6 also have some degree of error, although it is very small. After completing a survey control network, the horizontal survey data is reviewed and analyzed using a variety of methods including the Least Squares method (the most common) and the Compass Rule method to adjust the network so that the angles and distances form a closed figure. In addition, each horizontal control point established during a control network will include an elevation value. Vertical control information is also reviewed and analyzed and adjusted to form a balanced network.