CA2372286A1 - A method for transmitting location information on a digital map - Google Patents

A method for transmitting location information on a digital map Download PDF

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Publication number
CA2372286A1
CA2372286A1 CA002372286A CA2372286A CA2372286A1 CA 2372286 A1 CA2372286 A1 CA 2372286A1 CA 002372286 A CA002372286 A CA 002372286A CA 2372286 A CA2372286 A CA 2372286A CA 2372286 A1 CA2372286 A1 CA 2372286A1
Authority
CA
Canada
Prior art keywords
road
information
location
location information
string
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
CA002372286A
Other languages
French (fr)
Other versions
CA2372286C (en
Inventor
Shinya Adachi
Satoko Miyama
Naoki Yamada
Seiji Yoshida
Yukio Ichikawa
Takashi Kawasato
Hiroyuki Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Corp of America
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP24216699A priority Critical patent/JP3481168B2/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to CA2372286A priority patent/CA2372286C/en
Priority to US10/075,164 priority patent/US7634452B2/en
Publication of CA2372286A1 publication Critical patent/CA2372286A1/en
Priority to US12/625,076 priority patent/US8078563B2/en
Application granted granted Critical
Publication of CA2372286C publication Critical patent/CA2372286C/en
Priority to US13/278,448 priority patent/US20120095672A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station

Abstract

when transmitting an on-road location on a digital map, an information provider transmits, as on-road location information, string of coordinates information representing the road shape of a road section includinq the on-road location having a predetermined length, additional information including at least one information item chosen from a group of the attribute information on the road including the road location and detailed information on the nodes is the road section, and relative information indicating the on-road location in the road section. Receiving party receiving this on-road location information performs shape matching to identify the road section on a digital map and uses relative data to identify the on-road location in this road section. The receiving party can identify the road shape with high accuracy even when only a small amount of string of coordinates data is available. This makes it possible to reduce the data transmission amount and identify an on-load location with high accuracy.

Claims (7)

1. A location information transmission method for reporting on-road location information on a digital map, characterized in that an information provider reports, as on-road location information;
a string of coordinates line information representing a road shape of a road section including the on-road location having a length determined depending on difficulty of shape matching;
additional information including an information item selected from a group of attribute information on a road including said road location and detailed information on nodes in said road sections; and relative information indicating said on-road location in said road section, and that a party that receives said on-road location information performs shape matching to identify said road section on a digital map and uses said relative data to identify the on-road location in said road section.
2. A location information transmission method according to claim 1, characterized in that a string of coordinates where coordinate data indicating the positions of the nodes and interpolation points included in said road section are arranged sequentially is used as said string of coordinate information.
3. A location information transmission method according to claim 2, characterized in that interpolation points that contribute less to shape matching are omitted out of the interpolation points included in said road section in order to generate said string of coordinate information.
4. A location information transmission method according to claim 3, characterized in that an interpolation point is omitted where a change in bearing is less than a predetermined angle with respect to bearing from an adjacent interpolation point or node and a distance from said interpolation point or node is less than a predetermined distance in order to generate said string of coordinates information.
5. A location information transmission method according to claim 2. characterized in that, as said string of coordinate information, coordinate data of a member chosen from a group of nodes and interpolation points included in said road section is represented using absolute coordinates and that data of members of nodes and interpolation points excluding said chosen member is represented using relative coordinates.
6. A location information transmission method according to claim 1, characterized in that said additional information includes at least one information item chosen from a group of road type code, road number, toll highway code, number of traffic lanes, regulation information, road width, number of connecting links to a crossing node and connection angle of each connecting link to a crossing node.
7. A location information transmission method according to claim 6, characterized in that said additional information includes accuracy information on a digital map data used.
CA2372286A 1999-08-27 2002-02-14 A method for transmitting location information on a digital map Expired - Lifetime CA2372286C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP24216699A JP3481168B2 (en) 1999-08-27 1999-08-27 Digital map location information transmission method
CA2372286A CA2372286C (en) 1999-08-27 2002-02-14 A method for transmitting location information on a digital map
US10/075,164 US7634452B2 (en) 1999-08-27 2002-02-14 Method for locating road shapes using erroneous map data
US12/625,076 US8078563B2 (en) 1999-08-27 2009-11-24 Method for locating road shapes using erroneous map data
US13/278,448 US20120095672A1 (en) 1999-08-27 2011-10-21 Method for locating road shapes using erroneous map data

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24216699A JP3481168B2 (en) 1999-08-27 1999-08-27 Digital map location information transmission method
CA2372286A CA2372286C (en) 1999-08-27 2002-02-14 A method for transmitting location information on a digital map
US10/075,164 US7634452B2 (en) 1999-08-27 2002-02-14 Method for locating road shapes using erroneous map data

Publications (2)

Publication Number Publication Date
CA2372286A1 true CA2372286A1 (en) 2003-08-14
CA2372286C CA2372286C (en) 2011-08-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2372286A Expired - Lifetime CA2372286C (en) 1999-08-27 2002-02-14 A method for transmitting location information on a digital map

Country Status (3)

Country Link
US (3) US7634452B2 (en)
JP (1) JP3481168B2 (en)
CA (1) CA2372286C (en)

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