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The research of multi-source heterogeneous spatial data exchange model based on GML

WANG Ya-qin~~(①②),TAO Hua-xue~~①,GAO Hua~②,SUN Cui-yu~~①(①College of Geo Info.Science and Technology,SUST,Shandong Tsingdao 266510;②College of Info.Science and Engineering,SDAU,Shandong Taian 271018)  
Geography spatial data sharing and their interoperation model are the key technology of digital earth.They are also the precondition of national spatial information construction and spatial data utilization.Data integration and interoperation as well as GML present research status are discussed in this paper.The system framework of GIS data integration and interoperation is researched.The GML-based spatial data exchange model and SVG-based information visual model are proposed.
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