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. 19, 2002
Filed:
Mar. 07, 2000
Keisuke Ohnishi, Tokyo, JP;
Shin Kikuchi, Musashino, JP;
Navitime Japan Co., Ltd., Tokyo, JP;
Abstract
A method of determining, by use of a computer, a minimum-cost route from a start location to a target location within a traffic network in accordance with a label determination method, in which traffic network locations are represented as nodes and a route between adjacent nodes is represented as a link. The method comprises (1) choosing at least one entrance station of a transportation network to be used whose straight-line distance as measured from the start location falls within a predetermined range and at least one exit station of the transportation network whose straight-line distance as measured from the target location falls within the predetermined range, and estimating cost of a walking route from the start location to the entrance station and cost of a walking route from the exit station to the target location, on the basis of the respective straight-line distances, each calculated by use of latitude/longitude data; and (2) incorporating, as links, the walking routes having estimated costs into a traffic network comprising the transportation network in order to express a comprehensive traffic network to thereby enable the computer to determine a route under desired cost conditions in accordance with the label determination method.