| 摘要 |
PROBLEM TO BE SOLVED: To lessen the capacity of update data when adding new facilities. SOLUTION: In a system for distributing update facility data from a distribution center to an on-vehicle machine, the distribution center (10) includes: a similar facility data extracting means (12) for extracting original facility data similar to update facility data; a differential data creating means (13) for creating differential data between the extracted original data and the update facility data; and a communication means (14) for distributing discrimination information of original facilities and the differential data. The on-vehicle machine (21) includes: a communication means (23) for receiving distributed data; an original facility data extracting means (24) for extracting the original facility data from the discrimination information of the received original facilities; and an updating means (25) for updating the facility data based on the update facility data by updating the extracted original facility data with the differential data to create the update facility data. COPYRIGHT: (C)2009,JPO&INPIT |
