Route guidance server, navigation apparatus, route guidance system, and route guidance method

Abstract

A position coordinate based route transmitted from a server is reconstructed as a route of link numbers or node numbers in map data of navigation apparatus 2 without error. A route guidance server 1 searches a route from a start point to end point designated by a navigation apparatus 2; selects all or a part of nodes included in the searched route as route nodes; sets complementary points to the respective selected route nodes on the route and at a distance longer than a predetermined distance from the respective route nodes; and transmits information including coordinate information on the route nodes and complementary points as route information to the navigation apparatus 2. Then, based on the coordinate information on the route nodes and complementary points transmitted from the server, the navigation apparatus identifies the route nodes and road links connecting the route nodes by identification numbers in map data the navigation apparatus it self has.

Description

Route guidance server device, navigation device, route guidance system and method technical field The present invention relates to a route guidance server device, a navigation device, a route guidance system, and a route guidance method suitable for vehicle route guidance. Background technique In recent years, the latest information sent by various information centers represented by road congestion is received through broadcasting and communication devices, and the driver of the vehicle is provided with appropriate travel information to the destination in consideration of the received latest information. Car navigation devices for routing (hereinafter referred to as navigation devices) have been widely used. For example, by receiving the latest traffic information such as traffic congestion and travel time provided by the traffic information center through FM multiplex broadcasting, etc., the shortest time route to the destination is calculated considering the traffic inf...

AI Technical Summary

Problems solved by technology

Therefore, in the matching process using only coordinate information and attribute information of nodes disclosed in Patent Document 1, there is a possibility that map matching of wrong nodes may occur, and the route information transmitted from the information center may not be reproduced as an accurate route.

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