Map information regenerating device

• US 5,614,895 A
• Filed: 11/09/1994
• Issued: 03/25/1997
• Est. Priority Date: 11/19/1993
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Arai, Masayuki, Imai, Takeshi, Ohomori, Masahiro
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Lee, Benjamin C.
• Application Number:
  US08/337,156
• Time in Patent Office: 867 Days
• Field of Search: 340/995, 340/990, 340/988, 340/993, 364/449, 364/460, 364/424, 395/135
• US Class Current: 340/995.15
• CPC Class Codes: G08G 1/0969 having a display in the form of a map
• CPC Class Codes: G09B 29/10 Map spot or coordinate position indicators; Map reading aids optical projection apparatus per se G03B

Abstract

A map information regenerating device usable in a vehicle travel guiding apparatus, which device is capable of freely revising a road map, i.e., adding, changing and deleting a road on the road map without changing data stored in a basic map-information storage but correlating change data with existing roads to assure the possibility of performing map-data processing such as course searching according to the revised map data. The device is so constructed that the map information may be read-out from a map information storage and stored in a buffer memory wherein the data is revised in a specified procedure according to the map change data read-out from an additionally used storage medium or/and obtained by using transmitting/receiving means.

Claims

1. A map information regenerating device comprising:

a map-information storage means for storing as road map information therein node information and link information on line segments with which roads extending on a map are approximated;

a map-change information storage means for storing as road change information therein node information and link information on a road to be changed on said map, in correlation with said node information and said link information on line segments stored in said map-information storage means;

a buffer memory for storing therein road map information on a specified area, said road map information being read-out from said map-information storage means;

a map-information revising means for revising said road map information on said specified area stored in said buffer memory, in accordance with said road change information read-out from said map-change information storage means; and

a display means for displaying on a screen a road map of said specified area in accordance with said road map information which has thus been revised.

2. A map information regenerating device according to claim 1, characterized in that said map-change information storage medium includes a separate buffer memory and means for supplying map-change information to said separate buffer memory.

3. A map information regenerating device according to claim 1, characterized in that said map-change information storage medium comprises an erasable programmable read-only memory means.

4. A map information regenerating device comprising:

a map-information storage means for storing as road map information therein node information and link information on line segments with which roads extending on a map are approximated;

a transmitting means for transmitting, in the form of road change information, node information and link information on a road to be changed on said map, in correlation with said node information and said link information on line segments stored in said map-information storage means;

a receiving means for receiving said road change information transmitted from said transmitting means;

a buffer memory for storing therein road map information on a specified area, said road map information being read-out from said map-information storage means;

a map-information revising means for revising said road map information on said specified area stored in said buffer memory, in accordance with said road change information received; and

a display means for displaying on a screen a road map of said specified area in accordance with said road map information which has thus been revised.

5. A map information regenerating device according to claim 4, characterized in that said remote transmitting means is located at a fixed station, said map change information is transmitted from the fixed station and is received in the vehicle wherein said application apparatus using the present device is mounted.