从高程数据中提取目标地形坡度和粗糙度方法研究

Research of Slope and Surface Roughness Extraction of Target Topography from Elevation Data

摘要: 以地外行星飞行器着陆区目标地形粗糙度和坡度作为主要研究内容，提出了对地形高程数据预处理，再进行地形特征信息提取的算法，并实现了相应的地形特征信息的提取.分析了基于双线性插值算法的高程数据重采样的基本原理；研究了地形坡度与粗糙度提取算法，并建立了相应的数学模型；应用某数字地形进行仿真验算，证明了基于高程数据的地形信息提取方法的可行性；为精确识别目标地形信息并对地形进行风险评估提出了一种新的研究思路.

Abstract: Based on slope and surface roughness of target topography as the main research contents,the preprocessing of topographic elevation data and extraction algorithm of topographic feature are researched,and the corresponding extraction of topographic feature is done.The basic principle of elevation data resample based on bilinear interpolation algorithm is analyzed.The extraction algorithm of topographic slope and surface roughness is researched,and the corresponding mathematical model is established.By simulation and checking calculation of a certain digital topography example,it is proved that the extraction method of topographic information based on elevation data is feasible.It will provide a new research approach for target information recognition and topography risk assessment accurately.