摘要
根据地形信息的尺度效应,将地形因子作为地形信息,选取局部方差粗糙度作为定量指标,通过计算地形因子的局部方差粗糙度与网格尺寸的关系曲线来确定适宜分辨率.实验结果表明:实验样区A和实验样区B的适宜分辨率分别为15m和20m,并根据地形信息熵的适宜分辨率确定方法对该适宜分辨率进行验证,得到了相同结果,从而证明文中方法的正确性和有效性.
It is inevitable to come across problems as deciding DEM appropriate resolution .According to the scale effect of terrain information ,this paper sets the terrain factors as topographic information and employs local variance roughness as quantitative index .By working out the relating curves be‐tween the local variance roughness of topographic factors and mesh size ,the appropriate resolutions are decided .T he experimental results show that the proper resolution of experimental area A and B are respectively 15m and 20m .Furthermore ,we can get the same results by a method of terrain infor‐mation entropy ,w hich proves the correctness and effectiveness of the proposed method .
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第5期974-977,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金资助项目(批准号:61074191)
国防科技预先研究课题资助项目(批准号:1010602010502)资助
关键词
水下地形
数字高程模型
适宜分辨率
局部方差粗糙度
underwater terrain
digital elevation model
appropriate resolution
local variance rough-ness
