摘要： 在DEM分形内插及建模过程中特征参数H和σ都是在标度不变域内拟合求解的，因此分形模型中标度不变域的确定直接决定H和σ的大小和DEM建模质量的好坏,常用方法是采用人机交互试验来选取标度不变域，该文提出了一种基于直线-多项式拟合的自动确定标度不变域的方法，实验结果证明，该方法在DEM自动建模过程中是简洁有效的。

关键词: 数字高程模型, 分形内插, 标度不变域

Abstract: During the process of DEM fractal interpolation and modeling, the characteristic parameters of H and σ are computed in scaleless space. How to ascertain the scaleless space directly influences the quality of DEM modeling. The method of human-computer interaction is used to ascertain the scaleless space. A auto-ascertaining method based on line-polynomial has been presented in this paper. Simulation results show the method is very concise and effective.

中图分类号: 

• TP391.9