Digital map position information transfer method

摘要

An encoder and a decoder are utilized for a location reference system in which different digital maps are installed in a transmitting side and a receiving side. The encoder comprises a selecting section for selecting supplemental points located around an endpoint of a target shape points set and a data creating section for preparing a transmitting data including both the target shape points set and the supplemental points to the receiving side. The decoder comprises a data acquiring section for acquiring data including supplemental points located around an endpoint of a target shape points set, a defining section for defining a shape points set on the digital map of the receiving side with reference to the supplemental points, and an output section for outputting a road section on the digital map of the receiving side in accordance with the defined shape points set.