Map database apparatus

Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment

Patent

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Details

701200, 701208, 701210, 701211, 701212, 340990, G06F16500

Patent

active

059283050

ABSTRACT:
A road on a map is expressed as link string data constituted with a plurality of links which represent minimum units of the road and nodes on a start point and an end point of the plurality of links. A map database apparatus is provided with a first storage device which stores in memory node information constituted with identifying information for identifying a plurality of links and position information of a node shared by adjacent links as map display data, and a second storage device which stores in memory home node information on an identical node, which is belonging to one link string data, with position information identical to that of a node of another link string data and adjacent node information which represents a node adjacent to the identical node in a link of another link string data to be connected to the identical node as route search information.

REFERENCES:
patent: 5036471 (1991-07-01), Tamura et al.
patent: 5161886 (1992-11-01), De Jong et al.
patent: 5204817 (1993-04-01), Yoshida
patent: 5337245 (1994-08-01), Matsuzaki
patent: 5410485 (1995-04-01), Ichikawa
patent: 5459667 (1995-10-01), Odagaki et al.
patent: 5523765 (1996-06-01), Ichikawa
Proceedings of the Vehicle Navigation and Information Systems Conference (VNIS), No. Conf. 1, Sep. 1989, Toronto, pp. 319-323, S. Kamijo et al., Digital Road Map Data Base for Vehicle Navigation and Road Information Systems.

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