Patent ID: 6246958
Filing Date: 2001-06-12
Classification: G01C,G08G

Abstract:
A car-navigation system, comprisingcommunication means adapted to communicate with an information processing apparatus having first map data corresponding to specific areas and first date data representing the date on which said first map data of each of said specific areas was registered;retaining means for retaining second map data corresponding to said specific areas and second date data representing the date on which the second map data of each of said specific areas was registered;a display for displaying an image corresponding to said second map data; andcontrol means for transmitting said second date data via said communication means from said retaining means to the information processing apparatus, comparing a date according to said second date data with a date according to said first date data, selecting from said first map data map data of one of said specific areas for which said data according to said first date data is a more recent date than said date according to said second date data, and updating said second map data for said one of said selected areas with said selected map data.