The control points in a network are typically established using high-accuracy surveying techniques and instruments, such as GPS (Global Positioning System), total stations, or precise leveling equipment. These instruments are used to measure the coordinates (latitude, longitude, and elevation) of each control point, and the information is recorded in a survey control network database.

The control network is strategically placed to cover the entire survey area, with control points located at key positions that are easily accessible and visible. The network is designed to create a geometric framework that facilitates accurate measurements, construction layout, and spatial referencing during the surveying process.

Once the control network is established, surveyors can use it as a reference to accurately position and orientate other surveying equipment, such as total stations or GPS receivers, throughout the project site. By referencing measurements to the control points, surveyors can ensure consistency and accuracy in their survey data, enabling precise mapping, setting out of structures, and other surveying tasks.

Control network installation is essential in various surveying applications, including topographic surveys, construction projects, land development, and infrastructure projects. It provides a reliable and consistent reference system that helps ensure accurate measurements, reliable data, and the successful execution of surveying projects.