US Patent 7512490 Method for reminding of entering target route

A method for reminding of entering a target route is disclosed. First, the method provides a Point of Interest (POI) at a conjunction of the present route and the target route and sets the POI as a basic voice reminding point. Next, the method determines whether the actual distance between the present position and the basic voice reminding point is less than or equal to the voice reminding distance. Then, when the actual distance between the present position and the basic voice reminding point is less than or equal to the voice reminding distance, a voice reminding message is sent out as the reminding of entering the target route correctly.