Ria And Soa-based Distributed Webgis Study

WebGIS is the World Wide Web geographic information system that use of interactive web technology to extend and improve a geographic information system technology, which is a combination of Internet and GIS products. With the growing impact of the Internet and GIS technology being widely applied to various industries, it is no longer satisfied with the current WebGIS based on the performance of web technology and interactive effects, and the development of system scalability and simplicity is also a higher requirements. RIA (Rich Internet Application, Rich Internet Applications) is a new generation of web applications, with good interaction with the user experience, the application will bring revolutionary changes to the Internet, but also to the WebGIS has brought new development opportunities and silverlight is Microsoft launched a very promising development of RIA technology. REST is a new style of web services; it will prepare the server to share any information as a resource and an identifier for each resource to determine the client identifier to operate through the resources, access to resources. Based on these new technologies to WebGIS for the study is to explore how the Silverlight framework and REST style architecture applied to the WebGIS in force in improving the performance of WebGIS and interactivity while reducing development complexity, increasing system scalability, with certain theoretical and realistic significance.This paper made the following studies:1) Firstly, studied the latest release of ESRI's ArcGIS RIA technologies-ArcGIS API for Silverlight, Silverlight platform to build on this technology in the animation effects, reaction speed, multimedia integration, the chart shows, many aspects such as transparency control than on HTML has a greater advantage of traditional WebGIS.2) Of the REST style of architecture and technology of ArcGIS REST API, REST is a way of publishing Web services, with a simple, easy to deploy, easy to maintain the characteristics of the next generation will be the main push of ArcGIS Server GIS services distributed.3) Focusing on the development of the ArcGIS API for Silverlight RIA client and to publish ArcGIS Server REST service as a way of server side WebGIS development proposed R/S-based WebGIS, analysis of the R/S structure compared to traditional C / S architecture and B / S architecture advantages. Silverlight and REST study shows that in the WebGIS have broad application prospects.4) Based on the study of relevant technologies, this article uses Silverlight 4.0 and ArcGIS Server 10.0 to do a test system development, basic functions to achieve the desired objectives of the module, the system performance of power and client interaction, good service, coupling the bottom end, high scalability To verify the R / S structure in the development of distributed WebGIS system value.