Map display system

• US 4,812,980 A
• Filed: 05/15/1986
• Issued: 03/14/1989
• Est. Priority Date: 05/16/1985
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Hanabusa, Kazunori, Ito, Kenzo, Yamada, Takeshi, Fujimoto, Hidetoshi
• Primary Examiner(s): Chin, Gary
• Application Number:
  US06/863,520
• Time in Patent Office: 1,034 Days
• Field of Search: 364/424, 364/443, 364/449, 364/460, 364/521, 73/178 R, 340/988, 340/990, 340/995, 342/450-452
• US Class Current: 701/200
• CPC Class Codes: G06T 17/05 Geographic models
• CPC Class Codes: G09B 29/106 using electronic means

Abstract

In a map display system, map-forming data necessary for display of a display area and character data representing display areas are stored in a map data memory. A display area commander reads map-forming data indicating a specified display area out of the map data memory, and produces a display area instruction. A display character commander selects character data for a given point of the specified display area designated by the display area designation commander, and produces a display character instruction. On the basis of the display area instruction from the display area commander and the display character instruction from the display character commander, a map of the specified display area and characters in the specified display area are displayed on a display.

Claims

1. A map display system comprising:

memory means for storing map-forming information required for display of a map of a predetermined area and storing coordinates of a predetermined spot within said predetermined area and a display character code representing the name of the predetermined spot, said display character code being formed by a plurality of letters, the entirety of each said display character code being associated with said coordinates of said predetermined spot corresponding to said display character code;

designating means for designating a scale of the map;

display means for displaying the map; and

display control means for reading out the mapforming information from said memory means and for causing said display means to display the map of the scale designated by said designating means, said display control means further causing said display means, in accordance with the coordinates and the display character code of the predetermined spot stored in said memory means, to perform a character display of said name on a position corresponding to said coordinates of the predetermined spot on the map displayed by said display means, said character display being positioned in accordance with the coordinates of the predetermined spot, the size of the characters and an interval between adjacent characters being maintained at a fixed value regardless of the scale designated by said designating means.

2. A system according to claim 1, wherein said display control means comprises means for causing said display means to display a mark indicating a position of the predetermined spot at a position corresponding to said coordinates of the predetermined spot on the map displayed by said display means, and for causing the character display of the name of the predetermined spot on a predetermined display portion of the display means using the display character code stored in said memory means.

3. A system according to claim 1, wherein said display means comprises means for changing the number of displayed characters of a name to be displayed in accordance with the scale designated by said designating means.