Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Patent
1996-10-21
1999-07-06
Louis-Jacques, Jacques R.
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
701208, 701209, 701212, 340990, G06F16500
Patent
active
059192453
ABSTRACT:
The present invention is applied to a map database apparatus, where: a road is represented as a link string in which a plurality of links, each of which has nodes at both ends thereof, are connected; and a plurality of link string data, each of which includes node information relating to the node and is respectively provided for each of levels which correspond to different scale maps with regard to an identical link string, are stored. And a link of a lower level which has a larger scale, the link being common to a link of a upper level which has a smaller scale, has a link identifying data which is common to a link identifying data of the common link of the upper level.
REFERENCES:
patent: 5031093 (1991-07-01), Hasegawa
patent: 5036471 (1991-07-01), Tamura et al.
patent: 5161886 (1992-11-01), De Jong et al.
patent: 5204817 (1993-04-01), Yoshida
patent: 5410485 (1995-04-01), Ichikawa
patent: 5513110 (1996-04-01), Fujita et al.
patent: 5523765 (1996-06-01), Ichikawa
Proceedings of the Vehicle Navigation and Information Systems Conference (VNIS), No. CONF. 1, Sep. 1989, pp. 319-323, S. Kamijo et al. "Digital Raod Map Data Base for Vehicle Navigation and Road Information Systems".
Arthur Gertrude
Louis-Jacques Jacques R.
Xanavi Informatics Corporation
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