Abstract: This paper puts forward the layering rule of a city transportation network from qualitative angle and realized hierarchy of the transportation network by using vector data of Xi’an transportation network. To lay the foundation of designing and realizing the hierarchical optimal path algorithm based on Oracle 9i space database, the loading and accessing technique to the space database were summarized and some programs to access the space database were explained.

Key words: transportation network, layering, loading, space database, access

摘要： 针对西安市道路网矢量源数据，从定性的角度提出了城市道路网的分层依据，实现了西安市道路网的分层，完成了分层道路网数据向Oracle空间数据库的加载，总结了基于OO4O(Oracle objects for ole)接口访问道路网空间数据库的技术要点，阐释了典型例程，为设计和实现基于空间数据库的分层路径寻优算法奠定了基础。

关键词: 道路网, 分层, 加载, 空间数据库, 访问

CLC Number: 

• TP39