| 摘要 |
A car navigation apparatus for determining entry/exit of a vehicle into/from a parking area based on a running state of the vehicle without using a dedicated parking area database. Upon entry into a parking area, the entry is determined by totally checking the speed of the vehicle, the presence or absence of turn-round motion, an error in a forward and backward direction of the vehicle, estimated by map matching, the presence or absence of front and rear intersections, and the widths of intersecting roads. On the other hand, upon exit from a parking area, the exit is determined by totally judging the detected speed of the vehicle, the presence or absence of a straight running distance, the presence or absence of a nearby road extending in parallel with the course of the vehicle, and the width of the parallelly extending road.
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