摘要
以坡向数据为例,分析了方向性地形数据的特征,阐述了平均值、标准差的统计机理和方法,定义了坡向标准差的计算公式,并利用VB实现了基于格网数据的统计分析。实例表明,方向性地形数据的平均值和标准差这类统计特征的计算依据传统的统计方法会导致错误的结果。
The characteristics of directional data are analyzed, and the method for directional data statistic is presented. The standard deviation of aspect is defined. Finally, the grid aspect data were experimented and analyzed. It is proved that traditional statistical method may lead to a wrong statistical result for directional data of digital terrain.
出处
《长沙交通学院学报》
2006年第2期20-23,共4页
Journal of Changsha Communications University
关键词
数字地形分析
方向性数据
坡向
统计
digital terrain analysis
directional data
aspect
statistic
