{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreicw7h6jft3evtci5ancbcz7wvj457kej73r5rf55pznhyrovwga2q"
    },
    "mimeType": "image/png",
    "size": 97106
  },
  "description": "A problem to be solved by the present invention is that a host vehicle position calculated on the basis of a GNSS is affected by shielding, reflection, diffraction, and the like of a positioning radio wave due to a structure, depending on a structure environment present around a receiver and an…",
  "path": "/patents/964798",
  "publishedAt": "2026-05-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/3844",
    "Hitachi Astemo, Ltd."
  ],
  "textContent": "A problem to be solved by the present invention is that a host vehicle position calculated on the basis of a GNSS is affected by shielding, reflection, diffraction, and the like of a positioning radio wave due to a structure, depending on a structure environment present around a receiver and an arrangement of positioning satellites at the date and time, and a detected measured position is output in a biased manner. A map processing device of the present invention processes map information used for positioning a host vehicle, and includes: a satellite orbit information acquisition unit that acquires position information of a plurality of positioning satellites; a pseudo distance acquisition unit that calculates a pseudo distance from the plurality of positioning satellites based on positioning radio waves respectively received from the plurality of positioning satellites; a positioning available satellite verification unit that identifies, among the plurality of positioning satellites, a positioning satellite for which a distance to the host vehicle position and the pseudo distance do not match as a positioning unavailable satellite; and a map generation unit that generates a map in which a direction from the host vehicle position to the positioning unavailable satellite is stored in association with the host vehicle position as a shielded range in which a positioning radio wave from the positioning unavailable satellite is shielded.",
  "title": "Map processing device and map processing method"
}