Invention Grant
US08131466B2 Navigation system, enlarged intersection image displaying method used in the system, and map information generating method 有权
导航系统,系统中使用的放大交叉路口图像显示方法,以及地图信息生成方法

Navigation system, enlarged intersection image displaying method used in the system, and map information generating method
Abstract:
When a vehicle travels along a guidance path and approaches an intersection, a vehicle navigation system determines crossing points between a circle having its center set to the intersection and a predetermined radius, and an approach link and an exit link for the intersection. The system also sets a direction connecting the crossing point for the approach link and the intersection as an approach direction, and sets a direction connecting the intersection and the crossing point for the exit link as an exit direction. The system determines a traveling direction at the intersection based on an angular difference between the approach direction and the exit direction, and determines a display position of the intersection on a screen. Further, an enlarged intersection image is drawn such that the approach direction is aligned with a 12 o'clock direction on the screen.
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