分析了矢量电子地图的现状，对采用面向对象的数据模型和数据结构实现矢量电子地图进行了研究。
This paper analyzes the current situation of vector electronic map and investigates the realization of vector electronic map with object-oriented data model and structure.
本设计采用层次化设计，运用链表与树形数据结构实现FAT文件系统，具有较高的可维护性与可移植性。
The design USES hierarchical design method, with the use of chain and tree data structure to achieve the FAT file system. It has well maintainability and portability.
不同物理数据结构之间的实现关系。
Realization relationships between the different physical data structures.
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