【作者】 田艳霞；

【导师】 胡文亮；

【作者基本信息】 河北师范大学 ， 自然地理学， 2003， 硕士

【摘要】 地理信息系统(Geography Information System，简称GIS)是一种采集、存储、管理、分析、显示与应用地理信息的计算机系统，是分析和处理海量地理数据的通用技术。随着分布式计算技术、面向对象的构件技术、网络技术的迅速发展，传统的GIS向着信息共享的网络GIS发展。WebGIS是GIS与网络的有机结合，它使GIS的应用领域扩展到社会的方方面面，成为了大众化的信息工具。 基于DCOM的分布式WebGIS，是由一组分布式服务器协同为Internet客户提供地理信息服务的网络地理信息系统。空间数据存储在多个站点上，服务器分析客户端的请求后，确定用户请求的数据的位置，然后获取相应的数据返回给客户端。分布式网络地理信息系统扩大了传统网络地理信息系统的数据访问能力和系统服务器的规模，所以在系统的数据处理能力和与用户的交互性方面有明显的改善，系统的功能也得到增强。 组件技术可以被封装成能实现与具体任务最紧密相关的功能模块，方便地进行组装和嵌入，有效地支持GIS在网络上的应用和二次开发。利用组件技术的分布式WebGIS是GIS的一大发展趋势，本文基于DCOM技术，实现了一个分布式的WebGIS系统。更多还原

【Abstract】 Geography Information System is a computer system which is used to collect, store, manage, analyze, display and apply the geography information ,It is a general technology to analyze and deal with the abundance geography data. With the rapidly development of distributed computing technology, Oriented-Object Component-based technology, network technology, Distributed GIS is an important research area of GIS , WebGIS is the combination of GIS and Web, The applied domain of GIS expand to every field of the society and GIS becomes to the public information tool.Distributed WebGIS based on DCOM is a system which supplies geography information service by a group of distributed server for Internet client. The spatial data is stored in many websites, The server analyze the request in the client and ensure the location of the data which is requested by the client, Then it acquirs the relative data and return it to the client. Distributed WebGIS enlarge the ability of visiting data and the scale of the server, so it strengthens the ability of processing data and improves the interaction with the user, the function of the system is strengthened too.Component technology can be encapsulated in the function module which is used to realize the task in detail, it can be assembled and embeddedconveniently and support the application and the second programming.Distributed WebGIS using component technology is inevitable trend of GIStoday. This paper presents a Distributed WebGIS based on DCOMtechnology.更多还原