1. A method for assisting a driver comprising: generating a video signal representing a vehicle environment outside a vehicle; extracting at least one feature from the video signal; comparing the extracted feature to at least one reference feature, the reference feature being selected from a plurality of reference features which are stored as location attributes in a map database; identifying an object in the vehicle environment on the basis of the comparison of the extracted feature and the reference feature; and providing an indication to a driver of the vehicle on the basis of the identified object.