| 摘要 |
A map data provides a road network, which is defined by multiple unit links and multiple link connection relationships. Each unit link represents a part of a road. The map data includes: an attribution data relating to each unit link, which defines a link connection relationship of a subject unit link at one end of the subject unit link. Each attribution data includes link connection information defining only one object unit link as a connection object of the subject unit link. The only one object unit link is selected from a group of one or more object unit links, which are coupled with the one end of the subject unit link. |
