MAP DATA USAGE SYSTEM AND PROGRAM

PROBLEM TO BE SOLVED: To provide a map data using system capable of realizing a map data use process suitable for a current network state while reducing a process load. SOLUTION: When performing route calculation, map data of the area used for the route calculation are read from a recording medium i...

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Bibliographic Details
Main Authors FUJIMOTO HIDETOSHI, KIMURA MASAHIRO
Format Patent
LanguageEnglish
Published 16.12.2004
Edition7
Subjects
ADVERTISING
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
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:PROBLEM TO BE SOLVED: To provide a map data using system capable of realizing a map data use process suitable for a current network state while reducing a process load. SOLUTION: When performing route calculation, map data of the area used for the route calculation are read from a recording medium into a RAM (S10), and updating map data are read from an external memory into a RAM (S20). If there exists the updating map data that belong to the area of "map data used for route calculation" that have been read at S10 (S30:YES), the updating map data are used to perform updating process with "map data used for route calculation" that have been read at S10 on an RAM (S40). After the map data updating process is performed, the map data that have been updated are used for route calculation (S50). COPYRIGHT: (C)2005,JPO&NCIPI
Bibliography:Application Number: JP20030153106