Navigation apparatus and information generating apparatus

DETAILED DESCRIPTION An object of the present invention is to provide an information generating apparatus that utilizes information with improved reliability achieved by improving the re liability of information having low reliability and, more specifically, to provide a navigation apparatus that utilizes position information with improved reliability by improving the reliability of information having low reliability.
Another object of the present invention is to provide a car navigation apparatus capable of utilizing position information transmitted through light beacons or radio wave beacons in a highly reliable manner.
In order to attain the above object, a navigation apparatus according to the present invention comprises: a first position information generating device that generates first position information as current position information regarding the navigation apparatus based upon a signal received from outside; a second position information generating device that generates second position information as current position information based upon another signal received from outside; and a control device that implements control to provide route guidance based upon current position information and map information.
And the control device uses the first position information as effective current position information if a position corresponding to the first position information generated by the first position information generating device is within an error range set for a position corresponding to the second position information generated by the second position information generating device.
In this navigation apparatus, it is preferred that the first position information has a higher degree of accuracy and a lower degree of reliability than the second position information; Also, it is preferred that the navigation apparatus is a navigation apparatus installed in a vehicle; and the first position information generating device includes a beacon reception device that receives information transmitted by a beacon device installed at a road and generates the first position information by receiving position information indicating a position at which the beacon device is installed