Digital map position information transfer method

Abstract

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.

1 . An encoder utilized for a location reference system wherein different digital maps are installed in a transmitting side and a receiving side of said system, said encoder comprising: 
 a selecting section for selecting supplemental points located around an endpoint of a target shape points set, wherein said supplemental points are referred by said receiving side in order to define a corresponding shape points set of said target shape points set during map matching; and    a data creating section for preparing a transmitting data including both said target shape points set and said supplemental points to said receiving side.    
   
   
       2 . A decoder utilized for a location reference system wherein different digital maps are installed in a transmitting side and a receiving side of said system, said decoder comprising: 
 a data acquiring section for acquiring data including supplemental points located around an endpoint of a target shape points set;    a map matching section for defining a shape points set, which is corresponding to the transmitter target shape points set, on the digital map of the receiving side by map matching 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.    
   
   
       3 . An encoder utilized for a location reference system wherein different digital maps are installed in a transmitting side and a receiving side of said system, said encoder comprising: 
 a selecting section for selecting supplemental points located around an endpoint of a target shape points set, wherein said supplemental points are referred by said receiving side in order to define a corresponding shape points set of said target shape points set; and    a data creating section for preparing a transmitting data including both said target shape points set and said supplemental points to said receiving side.    
   
   
       4 . A decoder utilized for a location reference system wherein different digital maps are installed in a transmitting side and a receiving side of said system, said decoder comprising: 
 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, which is corresponding to the transmitter target 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.