{
  "$type": "site.standard.document",
  "description": "A road learning device includes: a map data storage device; an own vehicle location detection portion; a travel data storage device; an unregistered road travelling determination device; an unregistered road travel data storage control device; a potential unregistered road track creation device; a…",
  "path": "/patents/1141974",
  "publishedAt": "2015-05-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/32",
    "Denso Corporation"
  ],
  "textContent": "A road learning device includes: a map data storage device; an own vehicle location detection portion; a travel data storage device; an unregistered road travelling determination device; an unregistered road travel data storage control device; a potential unregistered road track creation device; a first correction device that corrects a potential unregistered road track to be a first track; a map-matching trial device for the first track; a primary successful map-matching determination device; a second correction device that corrects the first track to be a second track when primary map-matching is unsuccessful; a secondary successful map-matching determination device for the second track; and a new map data storage control device that discards a group of unregistered road travel data when secondary map-matching is unsuccessful, merges the first track with the map data when the primary map-matching is successful, and merges the second track with the map data when the secondary map-matching is successful.",
  "title": "ROAD LEARNING DEVICE"
}