{
  "$type": "site.standard.document",
  "description": "The present invention provides a system for automatically specifying tunnel entrance and a method therefor. The 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…",
  "path": "/patents/990540",
  "publishedAt": "2013-05-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/3807",
    "TOYOTA MAPMASTER INC [JP]"
  ],
  "textContent": "The present invention provides a system for automatically specifying tunnel entrance and a method therefor. The 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 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.",
  "title": "DEVICE AND METHOD FOR SPECIFYING ALTITUDES OF TUNNEL ENTRANCE AND EXIT, COMPUTER PROGRAM FOR SPECIFYING ALTITUDES OF TUNNEL ENTRANCE AND EXIT, AND RECORDING MEDIUM FOR RECORDING THIS COMPUTER PROGRAM"
}