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Tunnel entrance / exit specifying device and method, computer program for specifying tunnel entrance / exit, and recording medium recording computer program
Tunnel entrance / exit specifying device and method, computer program for specifying tunnel entrance / exit, and recording medium recording computer program
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机译:隧道出入口确定装置和方法,用于指定隧道出入口的计算机程序以及记录计算机程序的记录介质
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摘要
Provided are a device which automatically specifies the elevation and location of a tunnel entrance, and a method thereof. An object entrance for specification of the elevation and/or the location of a tunnel entrance is selected from a map data storage unit. A road link which includes the selected object entrance is designated as an object road link. An elevation of a prescribed region which includes the object entrance is acquired. A boundary is determined between a flat portion and an inclined portion upon the object road link, on the basis of the acquired elevation. The elevation at the determined boundary is specified as the elevation of the object entrance, and/or the determined boundary is specified as the location of the object entrance.
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