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Chen Jun(National Key Lab. for Information Engineering in Surveyin Mapping and Remote Sensing,Wuhan Technical University of Surveying and Mapping, Wuhan 430070)  
A spatial data model provides data description concepts and methods useful for GIS spatial data modeling.The important concepts include the spatial entities and their spatial relationships which are used to construct spatial database schema in designing GIS tools and implemention GIS projects. Since spatial data models play a very important role in the development of GISs, many R D efforts have been devoted to the study of spatial data models by GIS academic community and industry in the world.This main objective of this paper is to identify the cutting-edge problems of current spatial data models and discuss what should be done in the future RD. After a brief introduction of the importance of the study of spatial data models, the second section examines the key issues and cutting-edge problems on the conceptual data modeling, logical data modeling and physical data modeling in GISs. Some of the research directions on spatial data models and the author’s research initiatives are discussed in the third section.
【Fund】: 国家教委霍英东青年教育基金
【CateGory Index】: P208
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