| 摘要 |
<p>When a navigation apparatus (10) generates, in the course of learning a new road, shape points information of the new road as well as new road information and connecting road information which respectively specify a road name, road attributes and other features of the new road and connecting roads, the generated information regarding the new road is examined if a corresponding road that corresponds to the new road is registered in case that a map database used by the navigation apparatus (10) is updated. If the corresponding road is found in the updated map database, the generated information of the new road such as the shape points information is deleted, thereby securely invalidating the generated information that became unnecessary due to the update of the map database.
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