| 摘要 |
PURPOSE: A car navigation system is provided to guide correctly a vehicle on an intersection by providing the magnification of the intersection to a driver. CONSTITUTION: A car navigation system includes a database portion(10), a navigation control portion(20), a display portion(30), and a speaker portion(40). The database portion includes an intersection pattern database, a road shape model diagram image database, a progressive arrow image database, and a voice guide database. The navigation control portion grasps a pattern of the next intersection from a road network database and the magnification of a 3D intersection by using the road shape model diagram image database and the progressive arrow image database corresponding to the pattern of the next intersection. The display portion outputs the magnification of the 3D intersection according to a signal of the navigation control portion. A speaker portion receives a signal from the navigation system and performs a voice guide operation.
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