Title:
【発明の名称】碁盤目状に区分された地理系を基にしてデジタル地図データを格納および検索する方法
Document Type and Number:
Japanese Patent JP2663029
Kind Code:
B2
Abstract:
A method for storage and retrieval of digital map data representative of a tessellated sphere including five zones. Firstly, the number of tessellations for each zone is defined. Secondly, the range of each zone is defined. Next, the radius of the sphere is defined. A sphereical data base is then created by warping the digital map data into the spherical data base by latitude and longitude. Finally, data from the spherical data base is retrieved and the data may be displayed on a cathode ray tube (CRT) display or a flat panel liquid crystal display.
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Inventors:
DOSON JON EFU
RONITSUSHU EDOWAADO DABURYU
RONITSUSHU EDOWAADO DABURYU
Application Number:
JP51159889A
Publication Date:
October 15, 1997
Filing Date:
October 18, 1989
Export Citation:
Assignee:
HANEIUERU INC
International Classes:
G01C21/00; G06F17/30; G06T11/60; G06T17/05; G09B29/00; (IPC1-7): G09B29/00; G06F17/30; G06T1/00
Attorney, Agent or Firm:
Masaki Yamakawa (3 outside)