The architecture and implementation technique of WebGIS are always the focus of scholars in its rapid developing process. Aiming at disadvantages of high complexity,poor interactive experience,and low response efficiency in "traditional" WebGIS application,this paper proposes a rich WebGIS application framework based on RIA/SilverLight and REST technologies which was divided into data access layer(DAL),business logic layer(BLL) and user interface layer(UI). Silverlight is an application framework for creating and delivering rich internet applications (RIA) and media experiences on the Web,which combining with the representational state transfer (REST) software architecture style can significantly remedy these shortages of "traditional" WebGIS application mentioned above. Firstly,in this paper the detailed description on designing and building steps of spatial databases were given,and the optimization experiences on spatial database were shared. Then the composition of business logic layer and its operating mechanism had been analyzed. To improve the efficiency of the user interface layer,the Model-View-ViewModel (MVVM) architectural pattern had been adopted. And to follow the user's habit,the office ribbon style had been used visually. The code-behind was programmed with.NET C#,and according to different function types,it was designed into event center component,configuration management component,UI interactive component,map container component,control management component,auxiliary function component,and the event center component is the communication hub. Finally,based on this framework,a rich WebGIS application which named LightGIS had been developed. It showed that the applied framework can effectively improve the efficiency,enrich user’s experience and enhance the system capability.
LU Yagang, QIU Zhi, YOU Xianxiang, ZHANG Hongmei, CHEN Li
. Design and Implementation of Rich WebGIS Application Framework Based on SilverLight and REST Services[J]. Journal of Geo-information Science, 2012
, 14(2)
: 192
-198
.
DOI: 10.3724/SP.J.1047.2012.00192
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