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《Geomatics World》 2009-03
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Research on Key Technologies of Multi-Scale Fast Display of Digital Map

LIU Can-you1,CUI Tie-jun1,GUO Li1,ZHANG Hai-feng2,ZHANG Dong-lin3(1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China;2.Hydrology Bureau,Yellow River Conservancy Commission,Zhengzhou 450004,China;3.Unit 73603 of PLA,Nanjing 210049,China)  
The pattern of map transfer has changed greatly from traditional paper map to modern electronic map.The map information transferring manner which was based on paper map in the past is on the basis of screen map now.It makes the map information transfer break the restriction of paper and press,which improves the flexibility and vitality of information transfer greatly.However,new problems are coming with it.For one thing,with the increase of geo-information how to symbolize the massive data and reduce the delay time;for another,how to make the screen map display at multi-scale which can be accustomed to the man's visual habit and reduce the noisiness.Based on the forefathers' research,the article does some discussion and summarization on the problems of multi-level representation and fast representation of electronic map.
【CateGory Index】: P208
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