Before revision: Network of reference stations used by Austrian Positioning Service (APOS) A geodetic control network (also geodetic network, reference network, control point network, or control network) is a network, often of triangles, which are measured precisely by techniques of terrestrial surveying or by satellite geodesy.
After revision: Network of reference stations used control surveying, such as Austrian Positioning Service (APOS) A geodetic control network (also geodetic network, reference network, control point network, or control network) is a network, often of triangles, which are measured precisely by techniques of terrestrial surveying or by satellite geodesy.