How are geodetic control points connected?

Geodetic control points are primarily connected to existing control networks for accuracy purposes. This connection ensures that measurements taken at new or additional control points are compatible with previously established points, providing a reliable reference framework. By relating new points to an established network, surveyors can ensure the positional accuracy and consistency of their measurements across larger areas.

This method allows for corrections based on the known positions of existing control points, which have already been established through various techniques like triangulation, GPS, or traditional surveying methods. Connecting new control points to these established benchmarks helps to maintain the integrity of geodetic datasets.

Other methods mentioned, such as using GPS coordinates exclusively or relying solely on local observations, may not provide the same level of accuracy or network integration. Triangulation is a fundamental technique used historically in surveying, but it does not encompass all methods of connecting modern geodetic points. Therefore, the best approach to establish an accurate and reliable geodetic control framework involves connecting to existing control points.