Abstract: A system and method of generating a parking areas map from signals gathered from users of pay by phone parking service is provided herein. The steps of a method may include: obtaining, from a plurality of personal communication devices, signals indicative of events which represent cars being parked at designated parking spaces; deriving a geographical location which corresponds with each one of the designated parking spaces; obtaining a street map which covers an area of interest which includes at least some of the designated parking spaces; applying an event processing function to the parked car events, the corresponding geographical locations and the street map, to yield tempo spatial data that associated events of parked cars and the street map; generating a parking areas map indicating all parking areas geographically marked on the steer map, based on the tempo spatial data.