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《Journal of Chongqing University of Posts and Telecommunications》 2004-05
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Scale-based spatial data model for GIS

WEI Zu kuan (College of Computer Science & Engineering,University of Electronic Science and Technology of China (UESTC),Chengdu 610054, P.R.China)  
Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer based model. Furthermore, in Web Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale based model. In this model we represent maps in three levels: scale view, block, and spatial object, and organize the maps in a set of map layers, named Scale View, which associates some given scales. Lastly, a prototype Web Based GIS using the proposed spatial data representation is described briefly.
【CateGory Index】: P208
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10 LIU Xin-gui,SUN Qun,HUANG Ya-juan,LI Wen;The Way to Pick up Speed of Electronic Map[J];Bulletin of Surveying and Mapping;2004-01
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