Patent Document ID: 20060241857
Application ID: 11328447
Patent Flag: 0

Claim One:
1. A navigation system searching a route from a departure node to a destination node using searching network data, the system comprising: a point of interest (POI) attribute information database accumulating POI attribute information, a network data edit means and a virtual node setup means, whereby the navigation system determines whether there is a plurality of POIs existing in a departure location and/or a destination location by making reference to relevant data in the POI attribute information database, and where the navigation system has determined a plurality of POIs, the virtual node setup means sets up a virtual node for connection to each node of the plurality of POIs through links having identical link cost, while the network data edit means adds the virtual node to the searching network data, and a route search means functions to search for routes using the searching network data containing the added virtual node.