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Recently semantic technology have been popular in the spatial information area, but this semantic ability can only support for its own system, cannot fulfils other system's need. So a semantic service middleware taking place of original semantic system, will give a free semantic service without change the system's internal structure.
This research is aimed to reduce the complexity of heterogeneous spatial data in system that services user on demand. Heterogeneous include heterogeneous standards, heterogeneous systems, heterogeneous mode and the heterogeneous contents of data. For this purpose, we describe the data conformably with Grid based on Web Service. This research implemented the method, and provided a set of middleware...
At present, in the field of earth science applications there is a difficult problem that how data sharing system to build data services and applications chains automatically, especially in geological data application. It involves the choice of data provider services, data selection, service composition and its interface matching issues. The traditional workflow depends on the strict syntax matching...
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