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《Computer Applications and Software》 2008-02
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DISCUSSION ABOUT DEM DATA INTERPOLATION IN THREE-DIMENSIONAL TERRAIN GENERATION

Wang Hai Chen Guoliang Huang Xinyuan (Institute of Information,Beijing Forestry University,Beijing 100083,China)  
The visible technology of terrain surface production by DEM has already been applied to many domains such as military,mapping,forestry and entertainment.The method of interpolating for regular square grid data based on contour line discrete sampling points is discussed.The practical effective motion fitting and the weighted average union interpolation method is adopted,and according to the characteristics of the regular square grid,the scope for interpolation is determined.In the interpolation process,the elevation value of mesh points in each data block is achieved based on the common interpolation of the near eight terrains data block.The problem that the terrain lifts suddenly caused by the great difference of the elevation value between the neighboring data blocks is optimized.
【Fund】: 国家863高技术研究发展计划(2003AA10Z232);; 国家科技支撑项目(2006BAD10A03);; 北京市科委项目(京森健0011)。
【CateGory Index】: TP391.41
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