The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2011
Filed:
Apr. 25, 2007
Minoru Sekine, Tokyo, JP;
Masaaki Ohira, Iwaki, JP;
Minoru Sekine, Tokyo, JP;
Masaaki Ohira, Iwaki, JP;
Alpine Electronics, Inc., Tokyo, JP;
Abstract
A map-data-generation device and a map-generation method used therefor, and a navigation device and a route-search method used therefor are provided. The map-data-generation device generates hierarchical guide-route-search-map data by using information about a road link of level(reference level), the road link generating a guide-object road. A first upper-level-link-determination unit determines a level-link by performing level-raising processing by using level--link information. A second-upper-level-link-determination unit acquires a plurality of links of levels (levelsto) higher than levelby performing the level-raising processing by using information about the level-link, and specifies an upper level map to which the link belongs on the basis of the range of a distance between a departure-point link and a destination-point link.