A novel network service mode of spatial information and its prototype system

摘要

At present, the existing problems concerning the structure of spatial information network service, which is based on Client/Server (C/S)and Browser/Server (B/S)modes, are as follows: particular application-oriented design, no standard and exchange concept are set up on data level, the efficiency of analysis and progressing of the spatial data is relatively low. This paper proposes a novel digital earth platform (DEP)framework, which is a application, service and decisionmaking support systems of geo-spatial data acquisition, storage, transmission, conversion, processing, analysis, retrieval, expression and output as a unified body, the core of which is to deal with spatial data for spatial geographic information network service Geo-Browser/Spatial Information Server (G/S)mode and Hyper Geographic Markup Language (HGML). Depth understanding and analysis of platform architecture, this paper realizes of digital earth platform prototype - U-Star based on the spatial information network service G/S mode, the platform has the merits of C/S mode that full use of client resources, efficient to deal with the client data, as well as the advantages of B/S mode that the unified client and convenient to access network. This platform is a new server which can cope with massive spatial information and a solution which can provide efficient service. It has already been applied into many fields, such as the digital tourism service system, the time sequence analysis of Wenchuan Earthquake, the real-time video monitoring based on the digital earth platform and the intelligent processing and exhibition of remote sensing data. The result indicates that the perfection of space, time and complexion of the spatial information network accessing will effectively improve the quality and efficiency of the shared data, which has very important theoretical significance and bright prospect of application.