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DEVELOPMENT OF A DISTRIBUTED SERVICE-ORIENTED GEOGRAPHIC INFORMATION SYSTEM FOR ECOLOGICAL RESOURCES QUANTITATIVE MEASUREMENT

Service-oriented architecture supports data and model sharing and interoperability. The concept of such a service-oriented and distributed architecture is applied to build and integrate web-based service models of ecological resources quantitative measurement. The paper is to develop and integrate a GI web service by using an algorithm that calculates net primary productivity of terrestrial vegetation (NPP) of low spatial resolution satellite images. The system employs ArcGIS Server, which is a mature business platform, as the geographic information server to offer basic service functions of GIS and construct NPP web service. To achieve the overall result, two separate web services are developed by using the geographic information services specification for reference: a) A web map services, which handles the acquisition and manipulation of the satellite images. b) Service which implements NPP calculation algorithm using results form the first web service. The prototype which is developed by using ArcGIS Server is to integrate NPP model web services and publish NPP final results.