About 67 results
https://drivepatents.com/patents/1086502 · 16 Jun 2004
A car navigation apparatus includes: a current position detection device that detects a current position of a vehicle; and a control device that detects a plurality of roads as candidates used formapmatching based upon roadmap information containing road d...
https://drivepatents.com/patents/1093557 · 3 Sep 2003
Disclosed is a single or multi-route map matching apparatus in a system which provides a navigation service via a mobile communication terminal. The map matching apparatus comprises: an information center for calculating an optimum route to a destination i...
https://drivepatents.com/patents/1096357 · 2 May 2003
It is an object of the invention to provide a method of transmitting position information of a digital map which can enhance matching precision on a receiving side. The invention provides a method of transmitting position information of a digital map in wh...
https://drivepatents.com/patents/1096911 · 9 Apr 2003
A vehicle navigation system comprises a GPS (220), gyroscope (230) and odometer (240). At regular intervals on a journey using the GPS and the odometer a vehicle actual first position is determined, whilst, with the GPS, system a second or redundant positi...
https://drivepatents.com/patents/1099427 · 8 Jan 2003
The invention purposes to provide a position information transmission method for accurately transmitting a position and a shape on a digital map with a small amount of data. In a position information transmission method of the invention, the transmitting s...
https://drivepatents.com/patents/1099809 · 11 Dec 2002
Vehicle navigation system comprising a navigation signal receiving means adapted to receive navigation signals, e.g. a GPS signal, including a position area, within said area the vehicle is located, a processing means comprising a map having a structure wi...
https://drivepatents.com/patents/1100478 · 13 Nov 2002
This invention provides a method of transmitting position information of a digital map capable of transmitting a position on a digital map efficiently and accurately. In a method of transmitting position information in which a transmitting side transmits p...
https://drivepatents.com/patents/1100453 · 13 Nov 2002
Map data (5) stored in a memory includes normal road data and additional road data for predetermined regions along a highway. A current location of a moving body is detected by sensor(s) (1,2,3,4). The normal road data or additional road data is selected o...
https://drivepatents.com/patents/1101511 · 25 Sep 2002
A method and apparatus for use with a mobile body navigation system are provided for reducing an amount of position data, expressing successive positions along a route that has been traversed by a mobile body, which are recorded by a data recording section...
https://drivepatents.com/patents/1103127 · 17 Jul 2002
According to the present invention, even when a road is in such condition that error may occur in detecting the position of a vehicle when only internal sensors are used, a lane on a road where the vehicle is currently traveling is determined, and the erro...