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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...
WPS (web processing service) is the specifications launched by OGC organizations for dealing with space data, which is different from the conventional Web Service. There aren't dedicated workflow environment for WPS service framework, and support of workflow environments in WPS application is the key technical challenges. Some of the workflow environment, such as Shark, still lack of effective implementation...
Recently, it is hot spot that accelerating construction of National Spatial Information Infrastructure and boosting sharing and application of Geospatial Information industry. While traditional WebGIS always binds spatial data and map display together, it is hard to display multiple-source spatial data dynamically, not to mention the dynamical overlay analysis of different kinds of data. Aiming at...
The core elements of Web GIS are spatial information processing and spatial data. It means that the flexibility of the Web GIS system depends on the cross-platform processing and the capability to analyze the heterogeneous data. Even though Web services are employed to add Web GIS the capabilities of cross-platform processing, the heterogeneous data still can not be well analyzed. The spatial analysis...
Buffer analysis is one of the most important GIS functions to take spatial analysis. Based on our experience on EO data parallel processing, we take buffer generation as an example to research how to accelerate the speed and scale of GIS operations. This paper analyzes the procedure of the original sequential algorithm, and then gives out the mechanism of the parallelization. As a result, it will...
The classical GIS has many difficulties in manipulating massive data, sharing results and interoperability among heterogeneous GIS, which encourages scientists to concentrate on these issues and explore new approaches. In theory, the integration of Grid and GIS has the potential to solve these problems, which makes senses that we research the following ways of GIS interoperability based on grid platform...
Spatial information grid, which is a kind of application grid for geo-computation, purchases an order for a powerful and easy-to-use running environment. In this paper, a powerful runtime environment for geo-computation is proposed based on web service. Based on it, SIG resources can be distributed, discovered, and matched, and a distributed, flexible and powerful data infrastructure is founded. Based...
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