Map database apparatus
First Claim
1. A map database apparatus that 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 and, wherein:
- 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, said level correlation link number having a level number of said higher order level and a link number of said common link in said higher order level.
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Accused Products
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.
45 Citations
5 Claims
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1. A map database apparatus that 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 and, wherein:
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, said level correlation link number having a level number of said higher order level and a link number of said common link in said higher order level. - View Dependent Claims (2)
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3. A map database apparatus that stores node connection 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, said node connection data representing relationship of connections between nodes, wherein:
said node connection data includes a level correlation link number 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, said level correlation link number having a level number of said higher order level and a link number of said common link in said higher order level. - View Dependent Claims (4, 5)
Specification