{
  "$type": "site.standard.document",
  "description": "The invention allows to accurately determine the vehicle estimated position on a multilayer road even under various situations. A car-navigation system is provided for determining an estimated position of a vehicle comprising a first judgment means for judging expressway as a first road predominant…",
  "path": "/patents/1106593",
  "publishedAt": "2002-02-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/28",
    "AISIN AW CO [JP]"
  ],
  "textContent": "The invention allows to accurately determine the vehicle estimated position on a multilayer road even under various situations. A car-navigation system is provided for determining an estimated position of a vehicle comprising a first judgment means for judging expressway as a first road predominant as estimated position, a second judgment means for judging ordinary road as a second road predominant as estimated position, and control means for determining the vehicle estimated position based on the judgment results of the first and second judgment means.",
  "title": "Car navigation system, corresponding navigation method and storage medium"
}