Map database

Map data is divided into meshes of a prescribed size. Treating four meshes as one group, mesh numbers are assigned to the meshes following an N pattern. After numbers are assigned to the four meshes, these four meshes are collected as one, and numbers are assigned to respective meshes following an N...

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Bibliographic Details
Main Authors TOOYAMA, YASUHIRO, OGAWA, ISAO, SUZUKI, HIDENOBU, TAKEUCHI, HIROSHI, FURUIKE, YOSHIMASA
Format Patent
LanguageEnglish
French
German
Published 07.07.2010
Subjects
ADVERTISING
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
CALCULATING
COMPUTING
COUNTING
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
ELECTRIC DIGITAL DATA PROCESSING
GLOBES
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
PLANETARIA
SEALS
SIGNALLING
SURVEYING
TESTING
TRAFFIC CONTROL SYSTEMS
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Summary:Map data is divided into meshes of a prescribed size. Treating four meshes as one group, mesh numbers are assigned to the meshes following an N pattern. After numbers are assigned to the four meshes, these four meshes are collected as one, and numbers are assigned to respective meshes following an N pattern. The map data storage medium stores the map data according to mesh number. As a result, data portions for areas located in close proximity are positioned in close proximity in the map database (20) (storage medium), to thereby improve access efficiency.
Bibliography:Application Number: EP20000107506