{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A database stores the road map data including node data and link data. A searching device calculates the link costs for links that correspond to individual route options, by considering the traffic rules and the difficulty level in turning at intersections on the route. The optimal route for which…",
  "path": "/patents/1082835",
  "publishedAt": "2004-10-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/3461",
    "PIONEER CORP [JP]"
  ],
  "textContent": "A database stores the road map data including node data and link data. A searching device calculates the link costs for links that correspond to individual route options, by considering the traffic rules and the difficulty level in turning at intersections on the route. The optimal route for which the number of turns is the lowest is extracted from the road map. Independent claims are also included for the following: (1) a navigation system; (2) a route searching method; (3) a computer program product for route searching.",
  "title": "Route searching system, route searching method, navigation system and computer program product"
}