| 摘要 |
<p>A tracking system determines the global coordinates of a vehicle (15) being monitored by a monitoring mechanism (39) located at a base station (38). The global coordinates are translated into coordinate values relative to a local reference point (84a-84e) selected by the system. The translated coordinate values are transmitted to the monitoring mechanism (39) in lieu of the global coordinates initially determined by the system. The monitoring mechanism (39) is aware of the local reference point (84a-84e) selected so that the monitoring mechanism (39) can determine the vehicle's location relative to the local reference point selected, another reference point, or a global reference point used to define the global coordinates. The local reference point selected to translate the global coordinates can be changed as long as the translation mechanism (29) and the monitoring mechanism (39) are aware of the change.</p> |
