Method for producing a known fixed spatial relationship between a laser scanner and a digital camera for monitoring traffic, wherein the laser scanner axis and the optical axis of the digital camera are aligned relative to one another only roughly, and the spatial relationship between a scanner coordinate system (1) defined by the position of the laser scanner and orientation of the laser scanner axis and a camera coordinate system (3) defined by the position of the digital camera and orientation of the optical axis of the digital camera is calculated computationally based on the measured values and the image of a vehicle driving through the monitoring area.