RTK measurement usually refers to mobile measurement devices using RTK technology. Use a GNSS receiver to connect to the CORS system through a radio station or network to perform RTK positioning. At the same time, a centering rod with a specified length is used to collect real-time high-precision coordinates of the bottom point of the centering rod, such as the collection of control point coordinates, fragment points, drawing root points, etc., and drawing lofting, etc.