Automatic propulsion civil engineering machine system with field explorer

摘要

A civil engineering machine has a machine control unit configured to determine data which defines the position and/or orientation of a reference point on the civil engineering machine in relation to a reference system independent of the position and orientation of the civil engineering machine. A geometrical shape to be produced on the ground may bedetermined with a field rover. The field rover may be used to determine a position of at least one identifiable point of the preset geometrical shape in the independent reference system. Curve data defining a desired curve in the independent reference system, corresponding to the preset shape, is determined at least partially on the basis of the position of the at least one identifiable point of the preset geometrical shape in the independent reference system. The hand held field rover 100 apparatus according to the invention includes a control unit 107 having a position data determination component, a shape fitting component and a shape storing component. The shape fitting component 110 is configured to define a defined shape corresponding to a series of surveyed positions. The shape fitting component (110) is configured such that a user may select for at least some of the surveyed positions whether the positions are part of a straight line portion or part of a curved portion of the defined shape.