Method for determining geometric data for parking processes of vehicles, wherein the lateral distance between the vehicle and a curb is measured several times successively by means of a distance sensor attached to the vehicle as the vehicle is driven by the parking space. The angle of the longitudinal axis of a vehicle and the curb is ascertained by determining a sideways movement angle between the present longitudinal direction of the vehicle and a preset longitudinal direction, which angle results from the sideways movement of the vehicle as it is driven along, by determining a curb angle between the preset longitudinal direction and the curb, which angle results from the course of the curb contour, and by determining the angle between the present longitudinal axis of the vehicle and the curb by adding the angle of sideways movement and the curb angle.