Patent ID: 8185306

Claim:
A method for identifying a position of a road section on digital maps, each map containing errors, the digital maps including a first digital map and a second digital map, the second digital map showing the road section at a different position from the first digital map due to the errors, said method comprising the steps of: at a transmitting side having the first digital map, selecting nodes from the road section on the first digital map on a predetermined condition; creating position information of the road section on the first digital map by using coordinate information of the selected nodes and distance information between the nodes; sending said position information of the road section; at a receiving side having the second digital map, receiving said position information of the road section; determining positions on the second digital map, which correspond to the positions indicated by the coordinate information included in the received position information; executing a route search between the determined positions using the distance information between the selected nodes indicated by the coordinate information included in the received position information; identifying a position of the road section on the second digital map, which is different from a position of the road section on the first digital map due to the errors, as the position of the route acquired by said executing a route search step.