Tunnel entrance elevation specifying device, method for specifying tunnel entrance elevation, computer program for specifying tunnel entrance elevation, and storage medium that stores computer program
US9082318B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2011 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jun 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems for automatically specifying a tunnel entrance and methods that accomplish same. One method includes a target entrance selecting step for selecting, from a map data storing portion, a target entrance for specifying an entrance elevation of a tunnel, a target road link assigning step for assigning, from the map data storing portion, a road link, which includes the target entrance, as a target road link, a corrected point extracting step for extracting a certain point as a corrected point, the certain point being located along the target road link and away from the target entrance outwardly of the tunnel by a predetermined distance, a corrected point elevation specifying step for specifying an elevation of the corrected point as a corrected point elevation, and a first target entrance elevation specifying step for specifying the corrected point elevation as a first elevation of the target entrance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.