optimizing access to spatial data based on oracle amp; arcsde 的空间信息访问优化
integration method of distributed spatial data based on oriented object 基于面向对象的分布式空间数据集成方法
research and implementation about cooperative modification of spatial data base-on ordb 的空间数据协同修改研究与实现
main content of this study are as follows . ( 1 ) establish the information system of environmental monitor using the language and gis software, build up the information system for this region, gold mine environmental spatial data base, attribute data base and analysis model data base 研究的主要内容包括:(1)建立环境监测信息系统利用相关地理信息系统软件和语言软件进行二次开发,构建起金矿环境空间数据库,属性数据库和分析模型数据库。
thirdly, integration of spatial data based on corba is explained in detail . the object of corba transfer mechanism is analyzed, including client, the implement of object and agent of object request, the strategy and structure of corba's mechanism is concerned 分析了corba的对象调用机制包括客户、对象实现和对象请求代理三大部分,对corba的集成实现策略和结构进行了剖析,认为corba能够最大限度地满足异构和多层次的网络环境下webgis系统的开发。