The Design And Realization Of WEBGIS Based On Middleware

With the Internet technology development, the traditional GIS develop to WEBGIS technology. WEBGIS is the organic integration of GIS technology and Internet technology, It enables GIS permeates from the field of application systems to all areas of the national economy, has become a popular information tool. In recent years, WEBGIS play an increasingly important role in national economy. From national defense to environmental monitoring, from ocean survey research to digital city, we can find WEBGIS has play more import role in many places.However, with the increasing use of GIS, Inconsistent GIS data formats bring great inconvenience to information sharing and data exchange, information isolated island issue has been very acute. Although some of international academic organizations have also expressed some geographic data and operating models, and promote it to domestic and international GIS developers actively, such programmes are based on the data layer solutions and not solve from the system level. In this paper, I choose the most popular research topics—WEBGIS. Based on the analysis of the traditional principles of WEBGIS, I propose the WEBGIS architecture based on Middleware, It can visit the isomerization unit data and resources from the system level. System is composed of three parts: middleware modules, GIS server modules, client modules. Based on Java technology, Middleware module use OOP and OOD method, realize network connectivity management, application management, transmission management and deployment management module. And design a perfect MQ based on the JMS standard;using thread pool and DBPool technology, the system show good performance. In addtion, I design and realize a GIS server based on the MapX ActiveX. In client module, I design and realize a prototype which achieves some of operation functions, and certify the functions of middleware module and GIS server module.