【作者】 崔应寿；

【导师】 李建松；

【作者基本信息】 武汉大学 ， 地图学与地理信息系统， 2004， 硕士

【摘要】 近年来，Internet／Intranet的飞速发展使得World Wide Web应用日益广泛，从而引发了一场Web技术的革命。地理信息系统作为综合的交叉学科也得到进一步的应用和发展，特别是地理信息系统和计算机网络技术的结合导致了网络地理信息系统的形成，网络地理信息系统利用网络优势向用户提供超媒体、交互式、分布式的空间信息具有传统GIS所不具备的优势。而现有的地理信息Web服务系统在支持海量空间数据发布、多源异构空间数据访问和多层体系结构部署方面能力不强，因而本文从网络地理信息发布的理论及实践出发，运用CORBA／Java中间件技术来研究、分析和设计基于Web的网络地理信息发布，以期改善地理信息发布的质量。具体的工作如下： (1)通过分析比较国内外网络地理信息服务系统，研究网络地理信息发布过程中各种关键技术。 (2)利用CORBA／Java中间件技术，解决由于传统的Web中间件技术无状态的HTTP协议而引起在网络瓶颈和安全性等方面的缺陷。 (3)从地理信息具有分布式、多源、异构等特点出发，提出了地理信息发布中的分布式数据源、代理请求的地理信息组件构架模式。 (4)提出了基于CORBA／Java中间件技术的地理信息网上发布的体系结构，并阐述了部件划分与服务器端各组件及客户端与服务器之间交互模式。 (5)设计获取不同文件格式的地理信息组件。 (6)阐述了互联网上地理信息查询及空间数据的索引服务。 (7)在详细介绍了地理信息发布多层体系结构的基础上，在JBoss应用服务上部署和发布矢量及影像地图等服务来验证前面的设计。 基于CORBA／Java中间件技术的地理信息发布模式具有灵活弹性的多层部署、组件级别上的安全可靠等特点，在网络地理信息系统领域中有着丰富的研究内容及广泛的应用前景。更多还原

【Abstract】 With the rapid development of Internet/Intranet lately, WWW(World Wide Web )has been used widely, which broke out the revolution of web technology. GIS as a compositive intersectional domain has been also made more application and progress. And WebGIS based on the combination of GIS and Web technology is emerging . WebGIS has more advantageous than the traditional GIS in providing super-media and spatial data of inter-operational and distributed to the user. This dissertation mainly studies, designs and analyses a publishing way of geographic information based on web which uses CORBA/Java middleware technology from the theory and advantage of the geographic information to improve the quality of publishing geographic information. In the following statements I will indicate in detail:(l)With analyzing and comparing geographic information Service Architecture of domestic and oversea , the key technology in the web publishing of geographic information can be researched.(2)Taking advantage of CORBA/Java middleware, the network Bottle neck and safety was solved which is due to the solution to the traditional Web in the middleware technology based on the non-state of the HTTP.(3)From the geo-information characteristics of the distributed data, diversity and different structure, the geo-information constructive mode of the distributed source and agency in geo-information publishing was come up with .(4)Putting forward to the construction based on CORBA/ Java middleware in geographic information net publishing, and introducing inter-mode between the Client and Server of distributed construction.(5)Design geo-information component which obtain different kind’s type’s information.(6)Expounding the visual process of geographic information on the net, indexing and consulting the service of geographic information.(7)On the basis of introducing in details geospatical information publishing and deploying multi- layer, the service as to the raster or image was published in the JBoss applied service to validate design’s above.The web-publishing model which is based on CORBA/Java middleware technology has the feature of the multi-layer deploy and the safety of different rank constructions, and it has rich in research content and widely applied prospect in Internet-GIS.更多还原