| 摘要 |
In a new map, links not constituting a new road and connected to links constituting the new road, are set as boundary links. Further, in an old map, the same links as the boundary links of the new map are set as boundary links of the old map. Then, in the new map, links connecting between the boundary links are searched for as new road constituent links. Further, in the old map, links connecting between the boundary links are searched for as deletion links. Then, link information of the respective boundary links of the old map data is replaced with link information of the respective boundary links of the corresponding new map data. The link information of the deletion links is then deleted from the old map data, and link information of the new road constituent links is added to the old map data, to thereby create delivery map data.
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