Map data access method for navigation and navigation system

摘要

There is provided a map data access method and device capable of reading out from a recording medium the map data requested by a navigation system and providing them to the system whether C language, etc. or JAVA (trademark), etc. is employed to constitute a processing program on the navigation system side. In the recording medium, the map data and a reading method of the data are recorded in pairs in a map data section and a method section, respectively. When a navigation function section requests the map data, a data access section reads out desired data in a method (program) read out from the method section according to a requested application programming interface (API). The data read out are supplied as a byte array object to the navigation function section. <IMAGE>