CORS, which stands for Continuously Operating Reference Station, is a network of high-precision GPS receivers that provide real-time positioning data for surveying, mapping, and geodetic applications. CORS networks are typically made up of multiple stations that are strategically located to provide coverage over a wide area. By utilizing CORS networks, surveyors can access real-time, high-accuracy positioning data without having to set up their own base stations. This can save time, improve accuracy, and reduce the cost of equipment and resources required for surveying projects.