Research On Service-based Urban Geospatial Data Sharing And Applications

The Internet technology has provided the broad stage for urban geospatial data sharing, but metadata inquiry, data downloading and format conversion based on Web, and enterprise database sharing exist insufficiencies. The urban geospatial data has several features, such as large kinds, big quantity, widespread origination, difference among the data model, the structure and the form, which cause that data sharing is still the great challenge that Digit Urban Construction must face. Along with the Web service technology, SOA as well as the Mashup technology developing, this article attempts to construct the urban geospatial data sharing frame by geography information service technology, and discusses the related application development way. The above frame and technology will provide new way for the digital urban construction data sharing.This article's research way is as following: Firstly, discussing the urban framework of geospatial data-sharing system which bases on Web technologies and WxS standards, refers to the latest GIS software product, and adopts the service-oriented architecture (SOA).Secondly, publishing the geographic information service by the ESRI's ArcGIS Server GIS and exploring the Web services-based application development approach. Finally, developing the GIS applications by the virtue of net,Java and JavaScript technology, meanwhile verifying that whether the frame of service-based geospatial data sharing is feasible and effective.The geospatial data sharing framework's content includes the production of geographic information services, registration, release, call. Geographic information services generally include mapping services, geocoding services, geoprocessing services, image services, geodata services. This paper builds, publishes and registers geography information services by the platform of ArcGIS9.3 software. This paper integrates several services on the use of JavaScript and. NET Web ADF methods.Under the support of "urban-based Web services framework for geo-spatial data services", this paper designs and develops two application cases, that is, city-based Web services security systems and emergency services, city-based Web services management system for municipal public facilities, respectively. It verifies that the proposed framework of Web services-based geospatial data services is effective and feasible.This study shows that: the city-based Web services framework for geospatial data services is feasible and effective. The development way for GIS application services is flexible and simple, beneficial for digital cities geospatial data sharing.