Method for determining at least one angle of oscillation and / or a rotation angle of a hosted load on a crane by at least one fastening means by way of a cable and method for attenuating oscillation movements and / or rotational movements load

Method for determining at least one swing angle (Φ) and / or a rotation angle (ψ) of a load (5) mounted on a crane (1) by at least one fastening element (4) by way of a cable where the crane (1) has an arm (2) and a carriage (3) displaceable linearly along the arm (2) by a drive device, in which the load (5) is fixed by at least one fastening means (4) by way of a cable, and the crane (1) it is provided at least one optical detection device (6) for detecting a swing angle (Φ) and / or an angle rotation (ψ) of the load (5), where - by at least one optical detection device (6) an oscillation angle (Φ) is detected and / or a rotation angle (ψ) of the load (5) characterized in that, - it is assumed that the oscillation angle (Φ) and / or the angle of rotation (ψ) detected is subject to a systematic error conditioned by at least one Optical detection device (6), where a mathematical model in which it is considered that the angle of oscillation and / or rotation angle may be in error is used, and - the value of systematic error which is subject is determined the swing angle (Φ) and / or the angle of rotation (ψ) detected.