论文在自主开发的空间数据库VISTA的基础上针对特定的对象-关系型数据结构，提出了相应的访问控制方法。
This paper describes the access control method for the specific relational-object data structure on the base of the self-developed spatial database, VISTA.
空间数据库的分布式体系结构一直是理论研究的热点和工程实践必须面对的问题。
The system structure distributed in spatial database is always the focus of theoretical research and the problem that projects must face.
结论所设计的空间数据库总体框架结构合理，技术路线正确，可行性强。
ConclusionThe results indicate that the designed total frame in a database construction could be reasonable, the technique route could be right, the possibility could be strong.
同时，详细地给出了应用此数据模型所建立的活断层探测项目信息系统空间数据库的库结构表。
At the same time, database structure table of the active fault surveying project information system is implemented in detail according to the application of professional data models.
空间数据库与传统数据库一样，在其物理层上要求有一些专门结构来支持搜索操作。
Query operation in spatial database require some special support at the physical level as well as in conventional database.
找到一个高效的索引结构一直是空间数据库研究的重点。
It is always the key technology of spatial DBMS to find a efficient index structure.
空间数据库的建立经历了概念设计、逻辑设计、物理设计过程，主要突出了道路、事故信息的数据结构设计。
The design of space-database went through concept design, logical design and physical design. This process gave prominence to designing the road and data structure of accidents information.
聚类分析是空间数据挖掘的一种方法，聚类算法能从空间数据库中直接发现一些有用的聚类结构。
Cluster analysis is a method of spatial data mining. Clustering algorithm can find some useful clustering structures directly from spatial data base.
空间数据库的建立经历了概念设计、逻辑设计、物理设计过程，主要突出了道路、事故信息的数据结构设计。
The design of space-database went through concept design, logical design and physical design. This process gave prominence to designing the road and data structure of accidents...
自从对空间数据库进行研究以来，已经出现了许多支持这些操作的空间数据结构。
There have been a great variety of spatial data structures to support such operations since researching spatial database.
自从对空间数据库进行研究以来，已经出现了许多支持这些操作的空间数据结构。
There have been a great variety of spatial data structures to support such operations since researching spatial database.
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