Navigation system

Details Navigation system Navigation system

2005-08-30

2005-08-30

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S209000, C701S212000, C701S213000

Reexamination Certificate

active

06937936

ABSTRACT:
The map data may be updated on a specified area basis. This may shorten the time for updating the map data as well as lowers the cost of map data update. A navigation system comprising a data center51for distributing map data about a designated area upon receipt of a data-distribution request; an on-board device14having a data storage that stores map data, for updating the map data about the designated area with new map data distributed from the data center; and wherein the map data distributed from the data center has a layered structure in which the map data in a lowest-layer represents the designated area while the map data in a higher-layer represents a wider area that includes a smaller area represented by a lower-layer map data.

REFERENCES:
patent: 6112200 (2000-08-01), Livshutz et al.
patent: 6122593 (2000-09-01), Friederich et al.
patent: 6163749 (2000-12-01), McDonough et al.
patent: 6184823 (2001-02-01), Smith et al.
patent: 6249742 (2001-06-01), Friederich et al.
patent: 6308177 (2001-10-01), Israni et al.
patent: 6473770 (2002-10-01), Livshutz et al.

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