CA2320159A1 - A system for pathfinding - Google Patents

A system for pathfinding Download PDF

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Publication number
CA2320159A1
CA2320159A1 CA002320159A CA2320159A CA2320159A1 CA 2320159 A1 CA2320159 A1 CA 2320159A1 CA 002320159 A CA002320159 A CA 002320159A CA 2320159 A CA2320159 A CA 2320159A CA 2320159 A1 CA2320159 A1 CA 2320159A1
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CA
Canada
Prior art keywords
pathfinding
path
designated
tile
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002320159A
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French (fr)
Other versions
CA2320159C (en
Inventor
Koji Amakawa
Edward J. Suranyi
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TomTom North America Inc
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Individual
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Filing date
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Publication of CA2320159A1 publication Critical patent/CA2320159A1/en
Application granted granted Critical
Publication of CA2320159C publication Critical patent/CA2320159C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
    • G01C21/34—Route searching; Route guidance
    • G01C21/3446—Details of route searching algorithms, e.g. Dijkstra, A*, arc-flags, using precalculated routes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/02—Marketing; Price estimation or determination; Fundraising
    • G06Q30/0283—Price estimation or determination

Landscapes

  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Development Economics (AREA)
  • Strategic Management (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • Accounting & Taxation (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Economics (AREA)
  • Marketing (AREA)
  • General Business, Economics & Management (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Game Theory and Decision Science (AREA)
  • Navigation (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Instructional Devices (AREA)
  • Near-Field Transmission Systems (AREA)
  • Error Detection And Correction (AREA)
  • Peptides Or Proteins (AREA)
  • Liquid Crystal Substances (AREA)
  • Circuits Of Receivers In General (AREA)
  • Memory System Of A Hierarchy Structure (AREA)

Abstract

A system (10) is disclosed for determining a path in a network (A, B, C, D, E, F, G, H, I, O) that decreases the number of accesses to disk (16) needed during the pathfinding computation. The network (A, B, C, D, E, F, G, H, I, O) is divided into a set of tiles (270, 272, 274). Certain sub-paths are precomputed and are grouped into webs. When finding a path, the system (10) will perform a pathfinding exploration within the tile (270, 272, 274) for the designated origin (450) as well as a pathfinding exploration within the tile (270, 272, 274) for the designated destination (452). A number of the webs will be used with the two explorations to determine a path from the designated origin (450) to the designated destination.
CA002320159A 1998-02-13 1999-02-08 A system for pathfinding Expired - Fee Related CA2320159C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/023,504 1998-02-13
US09/023,504 US6016485A (en) 1998-02-13 1998-02-13 System for pathfinding
PCT/US1999/002649 WO1999041692A1 (en) 1998-02-13 1999-02-08 A system for pathfinding

Publications (2)

Publication Number Publication Date
CA2320159A1 true CA2320159A1 (en) 1999-08-19
CA2320159C CA2320159C (en) 2008-04-01

Family

ID=21815477

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002320159A Expired - Fee Related CA2320159C (en) 1998-02-13 1999-02-08 A system for pathfinding

Country Status (8)

Country Link
US (1) US6016485A (en)
EP (1) EP1062616B1 (en)
JP (2) JP2002503817A (en)
AT (1) ATE347712T1 (en)
AU (1) AU2662199A (en)
CA (1) CA2320159C (en)
DE (1) DE69934301T2 (en)
WO (1) WO1999041692A1 (en)

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Also Published As

Publication number Publication date
AU2662199A (en) 1999-08-30
EP1062616A1 (en) 2000-12-27
ATE347712T1 (en) 2006-12-15
WO1999041692A1 (en) 1999-08-19
DE69934301T2 (en) 2007-06-21
JP2009156873A (en) 2009-07-16
JP2002503817A (en) 2002-02-05
EP1062616A4 (en) 2002-04-24
EP1062616B1 (en) 2006-12-06
US6016485A (en) 2000-01-18
WO1999041692A8 (en) 1999-09-23
DE69934301D1 (en) 2007-01-18
JP4705176B2 (en) 2011-06-22
CA2320159C (en) 2008-04-01

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