| 摘要 |
PURPOSE: A navigation information providing method using an efficiently expressed rotary pattern is provided to utilize efficiently expressed road patterns, especially a rotary pattern, in TBT(Turn-By-Turn) guide of a navigation system. CONSTITUTION: A navigation information providing method using an efficiently expressed rotary pattern is as follows. Attribute information corresponding to one or more specified sections included in a rotary is obtained. The advance direction of a vehicle is computed based on the entry position of the vehicle based on the obtained attribute information. An advance link to a guide route is set based on the computed advance direction and displayed with a TBT method. The attribute data includes the distance of a specified section and one or more links guide object routes.
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