Patent ID: 7342516
Filing Date: 2008-03-11
Classification: G08G

Abstract:
1. A route information supply system comprising: reception means which receives information on a current position and a destination from a terminal device by communication; map data storage means storing at least two kinds of map data, one of which is detailed map data and the other of which is summary map data, the two kinds of map data being differentiated into a plurality of levels by fineness of each stored information of road data, background data and name data; traffic information storage means which stores traffic information; route search means which searches for a guidance route based on the current position and the destination; map information generation means for defining a map information generation area of delivery map including searched guidance route of map information of delivery map including a searched guidance route by utilizing said map data storing means, generating map information of said delivery map utilizing detailed level map data information of said delivery map for a circle of a predetermined diameter of which center of the circle is the current position and destination received by said reception means and an area within a predetermined distance along the searched guidance route, generating map information of said delivery map utilizing summary level map data for another area in said map information object area, and if an event satisfying a prescribed condition regarding the traffic information exists in a circle of predetermined diameter in the map information generation area of delivery map including searched guidance route of said map information of said delivery map, generation map information of said delivery map utilizing detailed level map data for the event area; and output means which outputs the generated map information of said delivery map to the terminal device.