Abstract: A method is provided for charging a user for parking a vehicle in a chargeable parking facility. Signals are received from at least one signal source at a receiver disposed within the vehicle. Using the received signals, an approximate path of travel of the vehicle is identified and it is determined whether the vehicle's approximate path of travel crosses a geofence associated with at least one boundary region of the chargeable parking facility. If the vehicle's approximate path of travel crosses the geofence, it is determined, with a degree of certainty, whether a park point approximating a location where the vehicle has come to rest lies inside the chargeable parking facility. If the park point is determined to lie inside the chargeable parking facility, the park point is associated with a charge, and the charge is assessed to the user.

Abstract: A low cost instant Real-Time Kinematic (RTK) positioning system and method are disclosed. The system comprises at least the following elements: a base station and a rover unit, each equipped with a Satellite Positioning System (SATPS) receiver and a generally license-free radio link transceiver. Such system has the distinctive feature of having no carrier integer cycle ambiguity to solve, thus allowing low cost single frequency SATPS receivers to be used for instant centimetre level relative positioning.