【摘要】 针对土地单元数据定性、高维、离散的特点,在土地质量分级的研究中,首次引进编码理论中“汉明距离”的概念,重新认识土地单元之间的距离,定义了土地单元之间距离的度量方法,并进一步采取投影寻踪的思想,得出“修正加权汉明距离”,用其作为实量土地单元之间“相似”或“指导”的统计量,采用该方法对北京市石质山区密云水库上游黄峪口小流域土地质量分级进行了尝试性应用.更多还原

【Abstract】 In the light of quantitative, highly dimensional and discrete characteristics of land unit data, the paper first induced the concept of Hamming Distance of coding theory to newly recognize the distance between the land units in the study of land quality classification, defined the method to measure the distance between the land units, and adopting projective track seeking method to obtain " correction weighted Hamming distance as a statistic value to evaluate the similarity and difference between the land units. The paper also tried the method to conduct classification of land quality of Huangyukou small watershed in upper reaches of Miyun reservoir in stony area of Beijing City.更多还原