| 摘要 |
<p>A road-map-data configuration that is capable of including pieces of link information showing a plurality of accuracy levels based on the accuracies of sources to appropriately configure road-network data, and that is capable of using the road-network data on the basis of an accuracy level shown in each of the pieces of link information is provided. The road-map-data configuration includes the road-network data representing roads using connection relationships among a plurality of links, and the pieces of link information concerning the links used to configure the road network data. Each of the pieces of link information includes accuracy level information based on the accuracy of a source of the piece of link information.
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