Abstract: Route calculation systems, methods, and programs extract from stored past routes, past routes that at least partly pass through a departure point area and at least partly pass through a destination area, and calculate, for each extracted past route, a new departure point side section route and a new destination side section route. The systems, methods, and programs calculate, for each extracted past route, a new candidate route that sequentially passes through the calculated new departure point side section route, a past section route, and the calculated new destination side section route. The systems, methods, and programs compute a cost of each calculated new candidate route and set the new route as the new candidate route having the smallest computed cost.

Abstract: Navigation devices, methods, and programs acquire a departure point and a destination, accept a designation of a passing area, and determine a departure-point-side border point on a departure point side and a destination-side border point on a destination side in the designated passing area. The devices, methods, and programs calculate, as a travel route from the departure point to the destination through the passing area: (i) a departure-point-side travel route from the departure point to the departure-point-side border point; (ii) a passing area travel route from the departure-point-side border point to the destination-side border point; and (iii) a destination-side travel route from the destination-side border point to the destination.

Abstract: An aspect of the present invention has a first disk-shaped member coupled to a first rotating shaft to rotate and a first plate-shaped member having a surface perpendicular to a surface of the first disk-shaped member and holding a first magnet. Moreover, a second disk-shaped member provided so as to face the first disk-shaped member and coupled to a second rotating shaft to rotate, and a second plate-shaped member having a surface perpendicular to a surface of the second disk-shaped member and holding a second magnet are provided. A magnetic pole of the first magnet on a side facing the second magnet and a magnetic pole of the second magnet on a side facing the first magnet have the same pole.

Abstract: Route calculation systems, methods, and programs extract from stored past routes, past routes that at least partly pass through a departure point area and at least partly pass through a destination area, and calculate, for each extracted past route, a new departure point side section route and a new destination side section route. The systems, methods, and programs calculate, for each extracted past route, a new candidate route that sequentially passes through the calculated new departure point side section route, a past section route, and the calculated new destination side section route. The systems, methods, and programs compute a cost of each calculated new candidate route and set the new route as the new candidate route having the smallest computed cost.

Abstract: Navigation devices, methods, and programs acquire a departure point and a destination, accept a designation of a passing area, and determine a departure-point-side border point on a departure point side and a destination-side border point on a destination side in the designated passing area. The devices, methods, and programs calculate, as a travel route from the departure point to the destination through the passing area: (i) a departure-point-side travel route from the departure point to the departure-point-side border point; (ii) a passing area travel route from the departure-point-side border point to the destination-side border point; and (iii) a destination-side travel route from the destination-side border point to the destination.

Abstract: An aspect of the present invention has a first disk-shaped member coupled to a first rotating shaft to rotate and a first plate-shaped member having a surface perpendicular to a surface of the first disk-shaped member and holding a first magnet. Moreover, a second disk-shaped member provided so as to face the first disk-shaped member and coupled to a second rotating shaft to rotate, and a second plate-shaped member having a surface perpendicular to a surface of the second disk-shaped member and holding a second magnet are provided. A magnetic pole of the first magnet on a side facing the second magnet and a magnetic pole of the second magnet on a side facing the first magnet have the same pole.

Abstract: A map updating system includes: an update processing unit for performing update processing by reading data required in the update processing from a cache area of a memory when the data are stored in the cache area and from a map database when the data are not stored in the cache area; a cache storage unit for storing the data read by the update processing unit in the cache area; a processing memory capacity determination unit for determining a processing memory capacity, which is a capacity of the memory required as an update processing area, on the basis of the content of map data to be subjected to the update processing; and a cache capacity determination unit for determining a cache capacity, which is a capacity of the memory allocated to the cache area, on the basis of the processing memory capacity.

Abstract: A navigation device that is provided with reference databases that include search databases that are referenced when the navigation device performs a location search for a location on a map, that accepts provided update data, and that performs update processing for the reference databases is provided with a priority processing unit that, in a case where a command to perform the location search is input during the update processing for the reference databases, gives priority to performing the update processing for location data that are stored in the search databases, as well as with a search unit that, after the update processing for the location data is completed by the priority processing unit, is enabled to perform the location search using the updated location data.

Abstract: A map updating system includes: an update processing unit for performing update processing by reading data required in the update processing from a cache area of a memory when the data are stored in the cache area and from a map database when the data are not stored in the cache area; a cache storage unit for storing the data read by the update processing unit in the cache area; a processing memory capacity determination unit for determining a processing memory capacity, which is a capacity of the memory required as an update processing area, on the basis of the content of map data to be subjected to the update processing; and a cache capacity determination unit for determining a cache capacity, which is a capacity of the memory allocated to the cache area, on the basis of the processing memory capacity.

Abstract: A vehicle navigation apparatus determines whether or not the currently traveled route having a current vehicle position matches with estimated routes after determining, on the basis of the traveled route history, the estimated routes which correspond to destination candidates. Then, the navigation apparatus further determines whether or not the subsequent portion of the estimated route overlaps with other estimated route, for selecting one of the destination candidates. The vehicle navigation apparatus thus selects the destination candidate, in a highly accurate manner in terms of user preference, based on the traveled route history.

Abstract: The system of the present invention provides easy update of a database containing a large amount of data arranged in a complicated interrelationship by use of a data file of a content limited to data differing from that already in the database, within a relatively short period of time. The system includes a navigation apparatus having a local storage database which contains, updated by a difference data file, a plurality of data groupings. The navigation apparatus determines conversion priority according to the operational state of an operation program and converts data in a local storage database to a referential data format in the order of the determined conversion priority. The system also includes a server apparatus for outputting the difference data file to the navigation apparatus.