NAVIGATION APPARATUS, UPDATE METHOD OF ROUTE SEARCHING DATA AND UPDATE PROGRAM FOR ROUTE SEARCHING DATA

摘要

PROBLEM TO BE SOLVED: To provide a navigation apparatus capable of performing route calculation which reflects a road a user frequently travels in a learned result. SOLUTION: The navigation system 100 capable of performing route search to a destination has a memory part 2 for storing data for route search which are hierarchized from a lower level having more information of a road network to a higher level having less information of the road network and a control part 11 for reflecting information of the road on the upper level data for route search in the case that a road corresponding to a route stored in the memory part 2 exists in data for route search of the lower level but does not exist in data for route search of the upper level. COPYRIGHT: (C)2004,JPO