| 摘要 |
A method of providing a return route for a global positioning system (GPS) device is provided. When the starting point and the destination of the return route are exactly opposite to the original starting point and the destination, the GPS device plans and provides a reverse route without re-setting the starting point and the destination all over again, and therefore the time of obtaining a return route can be substantially reduced. The efficiency of the GPS device in planning routes can be effectively promoted.
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