3D CONTROL SYSTEM FOR CONSTRUCTION MACHINES

A construction system utilizing 3D control includes a fixed base station of known location; a self-propelled construction machine located in the general vicinity of the fixed base station; and a rotating mobile unit assembly mounted on the self-propelled construction machine and having a location-determination device arranged to rotate around an axis. The location-determination device is adapted to operate in conjunction with the fixed base station to determine geodetic information about the self-propelled construction machine.