1. A method for assisting a driver comprising: generating a video signal representing a vehicle environment outside a vehicle; transmitting a first data signal from the vehicle to an external data processing resource, the first data signal including at least location data of the vehicle; transmitting a second data signal from the external data processing resource to the vehicle, the second data signal indicating at least one reference feature selected by the external data processing resource in response to the transmitted location data from a plurality of reference features which are stored as location attributes in a map database; comparing, by a vehicle-based data processing resource, at least one feature extracted from the video signal to the at least one reference feature; identifying an object in the vehicle environment on the basis of the comparison of the at least one feature extracted from the video signal and the reference feature; and providing an indication to a driver of the vehicle on the basis of the identified object.