Patent ID: 6507783
Filing Date: 2003-01-14
Classification: G01C,G01S

Abstract:
A mobile navigation system comprising:present position information generating means for detecting the current position of a mobile means to generate present position information; map information storing means for storing map information of a predetermined region; map information generating means for reading said map information of said predetermined region from said map information storing means based on said present position information to generate display map information from said map information obtained, said map information generating means including near region map information reading means for reading out, from said map information storing means, map information of a near region of the predetermined region indicated with said display map information every time said mobile means moves for only a predetermined distance; and far region map information storing means for generating map information in a far region extending along a moving route in which said mobile means has moved from said near region map information and storing such information as readout map information; moving distance calculating means for calculating a moving distance of said mobile means based on said present position information; and display means for displaying said display map information and said present position information.