Research On Geographic Information Web-Publishing Based On CORBA/Java-Middleware Technology

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.