The Research of Spatial Heterogeneous Data Source Integration of GIS
地理信息系统空间异构数据源集成研究

The article compares several universal integration techniques and methods via to access and integrate Spatial Heterogeneous Data on GIS. And in the paper, the authors discuss the key theory and technique of Spatial Heterogeneous Data Integration. Last, we give emphasis introducing the Integration method based on XML and Middleware technique. And we consider that the most major of XML is the independence of it's data storage format with display form. Along with the development of RDF and VDB, with data describing tool and transition tool based on XML by way of integration layer, middleware possessing capability of data sources integration is suit to the need of spatial heterogeneous data source integration.