METHOD AND APPARATUS FOR TRANSMITTING POSITION INFORMATION ON A DIGISTAL MAP

摘要

The invention purposes to provide a position information transmission method for accurately transmitting a position and a shape on a digital map with a small amount of data. In a position information transmission method of the invention, the transmitting side transmits road shape information to specify the target road section on a digital map and event information to specify an event position by using a relative position in the target road section and the receiving side performs map matching based on the road shape information to identify the target road section and identifies the event position in the target road section based on the event information is characterized in that the transmitting side intermittently selects nodes included in the target road section to include the coordinate data of the nodes in the road shape information for transmission, and that the receiving side performs map matching to determine the positions of the nodes included in the road shape information and obtains the road connecting the nodes by way of a route search to identify the target road section. It is thus possible to efficiently and accurately transmit an event position on a digital map.