Map database apparatus

Details Map database apparatus Map database apparatus

1997-10-22

2000-10-03

Issing, Gregory C.

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

701212, G01C 2100, G06G 778

Patent

active

061285730

ABSTRACT:
A map database apparatus according to the present invention stores a plurality of sets of link string data provided separately to correspond to maps at different scales representing a road as a link string constituted by connecting a plurality of links each having a node at a front end and a rear end thereof. In the map database apparatus, a level correlation link number is provided as data that indicate a link string in a lower order level at a larger scale that is common to a link in a higher order level at a smaller scale, the level correlation link number having a level number of the higher order level and a link number of the common link in the higher order level.

REFERENCES:
patent: 5031104 (1991-07-01), Ikeda et al.
patent: 5285391 (1994-02-01), Smith, Jr. et al.
patent: 5523765 (1996-06-01), Ichikawa
Article entitled Digital Road Map Data Base for Vehicle Navigation and Road Information Systems by Shunichiro Kamijo et al., pp. 319-323.

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