【摘要】 空间数据的异构、分布与海量的固有特点导致了空间信息应用的分布与难于集成的现状,成为制约空间数据大规模应用的主要因素。根据服务链的思想,提出了基于PG(优先图)构造服务链图进行空间数据应用集成建模的方法,并定义了一组变换实现对模型的逐步精化和向现实模型转化。该方法在面向资源环境的空间信息应用服务中进行了初步应用。更多还原

【Abstract】 It is difficult to integrate spatial information applications because of the distribution and heterogeneous of spatial datasets. In this paper, we present an approach to modeling spatial data application service chain based on the theory of priority graph and Web Service technology. With this approach, single Web services can be aggregated into one complex and extensible service chain. A set of graph transformation is also defined to refine and convert such conceptual model into an operational model. This approach was tested in one of our spatial information service applications.更多还原