1. A method for determining processed image data of a surround field of a vehicle, comprising: combining a map information item with a position of the vehicle, an orientation of the vehicle, and an image of the surround field acquired by a surround-field monitoring device of the vehicle, in order to obtain a position-specific image of the surround field; and processing the position-specific image so as to include at least one symbol which is assigned to a classified object in the position-specific image, in order to determine the processed image data.