| 摘要 |
In navigation system, method, and program for an automotive vehicle, a travel history of the vehicle which is made correspondent with a road map information is stored, a degree of a user's familiarity with one of predetermined regions for each of the predetermined regions in the road map information is calculated on the basis of the travel history of the vehicle and its corresponding road map information, and the road map information is produced in accordance with the calculated degree of the user's familiarity with the one of the predetermined regions.
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