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On Line Simplification for Digital Map

Li Weisheng (School of Information Engineering,WTUSM,39 Luoyu Road,Wuhan,China,430070)  
For zooming in or out the map in a real time GIS application,and for quick transportation of the vector map in a network,this paper proposes the on line map generalization concept.It discusses the on line simplification to the line object in detail.Two algorithms are proposed.Their Complex are all from θ (1) to θ(n) .It is a great progress comparing the normal DP algorithm whose complex is from θ(n) to θ(n 2) .The discussion about the reducing the spatial complex is also involved in the paper.
【Fund】: 测绘遥感信息工程国家重点实验室开放研究基金
【CateGory Index】: P283.7;TP391
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