JP2005214684A5 - - Google Patents

Claims (4)

In a navigation device mounted or carried on a mobile object,
Less included in the facility data received from the transmitter and received by the receiving means
Both facility information writing means for registering facility information by writing facility information having location information and name information of the facility into a writable facility information storage means ;
Received by the receiving means based on the facility information stored in the facility information storage means
It is determined whether or not registration of facility information included in the facility data stored in the facility information storage means is necessary.
Registration necessity judgment means,
Facilities included in the facility data received by the receiving means by the registration necessity judging means
If it is determined that information needs to be registered in the facility information storage means,
The facility information writing means writes the facility information into the facility information storage means.
Te, navigation device according to claim der Rukoto to perform the registration of the facility information. If the facility information included in the facility data received by the receiving unit is not registered in the facility information storage unit, the registration necessity determination unit needs to register the facility information in the facility information storage unit. 2. The navigation apparatus according to claim 1 , wherein the navigation apparatus determines that the information is information. A facility information presence / absence determining means for determining whether or not facility information related to the same facility as the facility indicated by the facility information included in the facility data received by the receiving means is registered in the facility information storage means;
When it is determined by the facility information presence / absence determining means that the facility information related to the same facility is registered in the facility information storage means,
The facility indicated by the facility information by overwriting the facility information included in the facility data received by the receiving unit into the facility information storage unit so that the facility information writing unit rewrites old information to new information. The navigation apparatus according to claim 2, wherein the information regarding the update is updated. Presence / absence determination means for determining presence / absence of the facility indicated by the facility information stored in the facility information storage means based on the reception status of the facility data transmitted from the transmitter;
And a non-search target processing means for processing the facility information related to the facility determined to be lost by the presence / absence determination means so as to be excluded from the search target by the facility information search means. The navigation device according to any one of items 1 to 3 .