LibPQ的PostgreSQL空间几何对象的实现方法  

Implementation of Geometric Objects Based on PostgreSQL Spatial Database with LibPQ

作　　者：吴亮[1,2] 陆锋[2] 刘兴权[1] 申排伟[2] 

机构地区：[1]中南大学信息物理工程学院,长沙410083 [2]中国科学院资源与环境信息系统国家重点实验室

出　　处：《地球信息科学》2006年第1期35-38,共4页Geo-information Science

基　　金：本研究由国家863重大项目(2003AA135070);国家自然科学基金项目(40201043);中国科学院知识创新工程项目(CXIOG-D04-02)资助。

摘　　要：利用PostgreSQL数据库管理系统所提供的访问接口LibPQ,实现了一种访问及操作空间几何对象的方法。该方法通过在客户端继承空间几何对象,并在自定义空间几何对象基础模型之上扩展的自定义空间数据模型。同时,充分利用自定义的扩展空间数据模型实现空间操作,进行GIS软件平台的研发。It is an important task in GIS research to efficiently access and manipulate the spatial data stored in database management systems. The author introduces the spatial systems, then puts forward a method accessing and manipulating data storage methods in database management geometric objects with LibPQ, which is provided by PostgreSQL DBMS. This method allows users to expand user_defined geometric models with inheritance from system geometric model. Moreover, the method can make full use of an expanded user_defined geometric model to process spatial operators. As a kind of open source database management system, PostgreSQL DBMS can provide users with conveniently operated procedures at a price lower than the non-open source database management systems. Users can code inside the database management system to solve some problems which can not be dealt using the non-open source database management systems.

关 键 词：空间数据库 POSTGRESQL LibPQ POSTGIS 空间几何对象 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP311.13[天文地球—测绘科学与技术]