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《Science of Surveying and Mapping》 2009-01
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Study on building DEM based on point-by-point interpolation algorithm

LAN Yan①,WANG Ming-hua②,LIU Shan-hong③,DAI Xiao-ai①(① Chengdu University of Technology,Chengdu 610059,China;②Southwest Jiaotong University,Chengdu 610031,China;③Wuhan University,Wuhan 430079,China;④Jimei University,Xiamen 361021,China)  
The principle and realization of building DEM based on the algorithm of mobile camber fitting and distance-weighted is discussed in the paper.The key technology to determine the dynamic influential radius and the weight function is also discussed.A new weight function is proposed on the basis of analysis of the common weight function.In the end,the precision of the two interpolation algorithm and the different weight function is estimated individually through the large amount of test data.
【CateGory Index】: P208
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