Patent attributes
A navigation apparatus includes a map information updating means (13) for updating map information on a basis of map update information, a mounting detecting means (14) for detecting whether a storage medium is mounted to a storage medium driving means, a map information ID comparison means (15) for comparing a map information ID attached to the map information with a map information ID attached to the map update information to judge whether they match each other, a map information selection control means (16) for, when the storage medium is mounted to the storage medium driving means and the map information IDs match each other, selecting all of the map information, and selecting a part of the map information otherwise, a navigation information calculating means (17) for creating navigation information on the basis of the selected map information, and a navigation information output means (18) for outputting the created navigation information.
