Navigation system, and program and storage medium for use in the same

Abstract

In this navigation system for storing map data in a storage means, and for searching the route to a destination based on the map data stored in the storage means to conduct a route guide up to the destination, the first route to the destination is searched as the recommended route by calculation based on a searching cost (step S11), the presence of the curve and the road having a prescribed value or more of height variation are detected from the first route (steps S12, S13), the searching costs for the detected curve and the detected road are changed (step S14) to search the second route to the destination (step S15), and the searched second route is compared with the first route to be recommended as the recommended route in stead of the first route which is difficult to travel (steps S17-S19).

Description

technical field [0001] The present invention relates to a navigation device that stores map data in a storage device, searches for a route to a destination based on the map data stored in the storage device, and performs route guidance to the destination, a program for the device, and a recording medium. Background technique [0002] In a navigation device that performs route guidance to a destination, when searching for a route to the destination for guidance, the route search is performed with the minimum search weight set in the road link. [0003] However, only using the above-mentioned route search, because vehicles also have different types such as length or width, height, weight, etc., depending on the type of vehicle, sometimes it is impossible to search for a route that cannot be driven or is not suitable. Therefore, Patent Document 1 proposes a navigation system that acquires necessary vehicle information for extracting a drivable road, extracts a drivable road ba...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned prior art navigation device, since the search weight when searching for a route to the destination is mainly determined by the distance, even if there are side roads and newly paved roads with extremely different drivability, if For roads that can be driven, it is inevitable to search for roads that are low in weight but difficult to drive, such as mountain roads, and recommend them as guide roads

And, in order to avoid the road that is difficult to travel, although it is also conceivable to set the data of the road that is difficult to travel as data in advance, and search for a route that can be avoided, this increases the amount of data that should store this part of data in the storage device.

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