1. A method for producing a known fixed spatial relationship between a laser scanner and a digital camera for traffic monitoring, comprising the steps of: aligning a laser scanner with a laser scanner axis and a digital camera with an optical axis relative to one another in such a way that a monitoring area defined by the scanning angle area is completely covered by the object field of the digital camera at a given photo point; scanning a vehicle driving through the monitoring area to obtain measured values associated with measurement points in relation to a scanner coordinate system 1 defined by the laser scanner and having polar coordinates; triggering a recording of the scanned vehicle by means of the digital camera when the vehicle reaches the photo point; generating a measurement structure by transforming a group of said measured values associated with said measurement points at the vehicle into a group of image points, filtering out the measured values which together form an identifiable measurement structure on the vehicle; transforming the measured values of the measurement structure which relate to the scanner coordinate system 1 into a transformed coordinate system with the same coordinate origin and Cartesian coordinates; and transforming the measured values of the measurement structure which relate to the transformed coordinate system 2 into a camera coordinate system defined by the digital camera so that the measurement structure is superimposed on the imaged measurement points of the imaged vehicle.