A system is disclosed for identifying the location of a vehicle, assemblying data related to vehicle performance and correlating the assembled data with vehicle location. From the correlation of data and location, a data base is generated that provides information for monitoring performance of the vehicle,...http://www.google.de/patents/US4831539?utm_source=gb-gplus-sharePatent US4831539 - Apparatus and method for locating a vehicle in a working area and for the on-board measuring of parameters indicative of vehicle performance
