建立DEM快速算法分析

Analyse of quick arithmetic at building DEM

在数字高程模型建立过程中 ,分析了距离权内插模型存在的缺陷 ,提出从选择附近点、考虑方向影响、数据点偏导数估计及减少计算误差等四个方面对模型进行修正。从而形成了DEM生成的快速算法。

This paper analyse the error of interval power in intercalary model,at the progress of building DEM and gives out a method in four ways to correct the model by considering the neighborhood point,direction effect,derivative estimate of data point and decrease the error of calculale.