DEM内插，利用移动曲面拟合法实现的解求地面高程的算法具有很好的指导意义。-DEM interpolation moving surface to be legally implemented the ground elevation Solutions algorithm has a good guide.

读取离散点坐标高程数据.dat文件，生成格网DEM，采用逐点内插法中的加权平均法求格网点高程(Read the discrete coordinates of elevation data.Dat file, generate DEM grid point by point interpolation method, the weighted average Faqiuge dot height)