Distributed Spatial Information Integration Based on Web Service
Spatial information systems and spatial information in different geographic locations usually belong to different organizations.They are distributed and often heterogeneous and independent from each other.This leads to the fact that many isolated spatial information islands are formed,reducing the efficiency of information utilization.In order to address this issue,we present a method for effective spatial information integration based on web service.The method applies asynchronous invocation of web service and dynamic invocation of web service to implement distributed,parallel execution of web map services.All isolated information islands are connected by the dispatcher of web service and its registration database to form a uniform collaborative system.According to the web service registration database,the dispatcher of web services can dynamically invoke each web map service through an asynchronous delegating mechanism.All of the web map services can be executed at the same time.When each web map service is done,an image will be returned to the dispatcher.After all of the web services are done,all images are transparently overlaid together in the dispatcher.Thus,users can browse and analyze the integrated spatial information.Experiments demonstrate that the utilization rate of spatial information resources is significantly raised thought the proposed method of distributed spatial information integration.
Hengjian Tong Yun Zhang Zhenfeng Shao
Department of Geodesy and Geomatics Engineering,University of New Brunswick Fredericton,New Brunswic Department of Geodesy and Geomatics Engineering,University of New Brunswick Fredericton,New Brunswic National Key Laboratory for Information Engineering in Surveying,Mapping and Remote Sensing (LIESMAR
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）