{
  "$type": "site.standard.document",
  "description": "A portable navigation device (20, 42) comprises an on-board powering facility, a map data receiving port, a logic board (30) that contains one or more map data storage semiconductor chips (32) as well as data processing facilities (34) , a GPS unit (36), and output means (35, 40) for outputting…",
  "path": "/patents/1090679",
  "publishedAt": "2004-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/20",
    "SIEMENS AG [DE]"
  ],
  "textContent": "A portable navigation device (20, 42) comprises an on-board powering facility, a map data receiving port, a logic board (30) that contains one or more map data storage semiconductor chips (32) as well as data processing facilities (34) , a GPS unit (36), and output means (35, 40) for outputting user information. All these elements are operatively connected within a housing assembly (20, 42). In particular, the device comprises selection means for selectively downloading geographically limited map data when in an information exchange situation viz à viz a map data information source under control of inputting geographically specifying information by a user, whilst substantially blocking other map data. Furthermore the device allows to store route data that are associated to the geographically limited map data for therefrom deriving user information.",
  "title": "A portable navigation device and a method for operating such device"
}