| With the socialization in GIS, information technology has become the major driving force in spatial data integration. In order to realize data-sharing of MSDS, bottleneck has to be got rid from them.Now the research on spatial geo-data sharing and cooperation focuses on integrations of model as well as software technology. However, not only the mind but also the methods in GIS integration are quite bitty, far from general. So we need to unify, both in micro and macro points of view, the framework of theory and method in various aspects of GIS system. Considering the spatial data-sharing, the base of MSDS is semantic sharing. Compared with data sharing, semantic sharing is to study how to understand the data we received and reduce the diversities in definitions and standards among different departments and person. From the point of theory, semantic sharing is the essence of GIS information sharing, which is to resolve not only the semantic problems, but those in cognizing and logic describing. While from the angle of technology, there are a lot of ways to realize data transferring, but few in semantic sharing.In this paper, the writer takes the construction of "Digital House Property" of Nanjing as the example, put forward the essence and strategies of semantic GIS sharing, solving scheme of application software as well. Aiming at the technology of spatial data integration, obeying the criterion of OpenGIS, and based on the deep analysis of methods of sharing and cooperation of MSDS, the writer emphasizes in three problems: How to realize the integration of MSDS database, how to achieve the sharing of metafile among different GIS platforms, and how to actualize auto or half-auto building of spatial relationship. This paper proves that only when we solve the data-sharing of MSDS, could we really construct a sharing platform, and so as to provide an idea for the construction of "Digital City" following that.The central contents and conclusions are listed as following: 1 , After studying the integration methods and technologies of GIS, we find5sharing platform is the most effective way of integration of geo-information, as well as the sharing basis of MSDS data. By improving the integration frame of sharing platform based on "Layer Service Model", it could be concluded that the longitudinal integration of GIS of sharing platform focuses mainly on the optimization, reuse, and position transparency of the internal functions of GIS. 2, Trough analysis and explanation on MSDS data under different GIS platforms, semantic sharing of GIS is turned out to be the essence of geo-information sharing, and compared with data sharing, the former studies primarily how to understand data we received, and mechanism of share and transfers of geo-information in GIS data.3 , Taking the "Digital House Property (DHP)" as the example, the paper has a try on the technical methods in semantic sharing of GIS.This paper, combined he construction emphasis of sharing platform in DHP, explores the essence of semantic share of GIS and its realizing strategies. Three aspects are emphasized here:(1) Integration of MSDS database based on the sharing platform of GIS;(2) Share of metafile under different GIS platforms with the semantic standards of sharing metafile;(3) Auto or half-auto building of spatial relationships according to rule and knowledge databases.
|
PDF Full Text Request