Method and apparatus for referencing a local trajectory in a global coordinate system

The invention relates to a method for referencing a local trajectory (20) in a global coordinate system (65), wherein the local trajectory (20) ordered local position (21) in a local coordinate system (23) comprising the steps of: receiving at least a to a global coordinate system (65) based global positioning (31) of the local trajectory (20) corresponding global trajectory (30), determining a quality (40) for the at least one global position (31), selecting at least one anchor position ( 41) (from the at least one global position (31) based on the determined grade 40), determining a displacement vector (42) between the local trajectory (20) and the global trajectory (30) at the at least one anchor position (41), transforming the local position (21) of the local trajectory (20) in the global coordinate system (65) on the basis of the displacement vector (42) to the minimum ens an anchor position (41), outputting in the global coordinate system (65) local transformed positions (22). The invention further relates to a corresponding device (1) and an associated motor vehicle (50).