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首页> 外文期刊>Geoderma: An International Journal of Soil Science >An algorithm for spatially constrained classification of categorical and continuous soil properties.
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An algorithm for spatially constrained classification of categorical and continuous soil properties.

机译：一种用于空间分类和连续土壤特性的分类算法。

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摘要

The creation of spatially contiguous clusters from multiple sources of information is an important objective in many scientific disciplines. We describe a supervised spatial classification algorithm in which the primary goal is to stratify a landscape or other spatial data into a set of discrete patches based on available categorical and continuous data. The proposed method consists of four major steps: (1) data pre-processing, (2) initial allocation through spatially constrained cluster analysis, (3) spatial aggregation and peripheral re-allocation of individuals, and (4) an optional hierarchical or non-hierarchical classification to summarize individual patches in few classes. Parameters needed are the number of spatial clusters, the minimum size of a cluster and the weight assigned to the categorical variable(s). The proposed method was sensitive to the spatial association between continuous and categorical variables as well as to the spatial correlation structure of the continuous variables. Both determine the optimum weight assigned to the categorical information and, therefore, the effectiveness of the classification. The proposed clustering method was robust in terms of finding natural clusters, allows using categorical and continuous variables, and offers a reasonable compromise between geographic contiguity and class homogeneity. Possibilities for further modifications are outlined..
机译：从多种信息源创建空间连续的簇是许多科学学科的重要目标。我们描述了一种有监督的空间分类算法，其中主要目标是根据可用的分类和连续数据将景观或其他空间数据分层为一组离散斑块。所提出的方法包括四个主要步骤：（1）数据预处理;（2）通过空间约束的聚类分析进行初始分配;（3）个人的空间聚集和外围重新分配;以及（4）可选的分层或非分层-hierarchical分类以汇总几个类中的单个补丁。所需参数是空间聚类的数量，聚类的最小大小以及分配给分类变量的权重。该方法对连续变量和分类变量之间的空间关联以及连续变量的空间相关结构敏感。两者都确定分配给分类信息的最佳权重，从而确定分类的有效性。所提出的聚类方法在查找自然聚类方面是鲁棒的，可以使用分类和连续变量，并且可以在地理连续性和类同质性之间提供合理的折衷。概述了进一步修改的可能性。

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