{
  "$type": "site.standard.document",
  "description": "A navigation system 100 includes: map data 120 expressing a road map which include zonal network data indicating connections among a plurality of parcels; a minimum cost route calculating means for calculating a minimum cost route achieving a least sum of parcel costs corresponding to parcels…",
  "path": "/patents/987675",
  "publishedAt": "2013-08-07T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/3446",
    "CLARION CO LTD [JP]"
  ],
  "textContent": "A navigation system 100 includes: map data 120 expressing a road map which include zonal network data indicating connections among a plurality of parcels; a minimum cost route calculating means for calculating a minimum cost route achieving a least sum of parcel costs corresponding to parcels present over a range extending from an origin parcel to a destination parcel by referencing the map data and using the zonal network data; an alternative route calculating means for calculating an alternative route by adjusting a parcel cost corresponding to a partial parcel which is part of a first parcel group constituting the minimum cost route; and a route search means 150 for searching for a route extending from the origin to the destination included in the first parcel group and for searching for a route extending from the origin to the destination included in a second parcel group constituting the alternative route.",
  "title": "Navigation system and route search method"
}