地理对象邻近关联网络度分布测算及其意义

Calculation of Degree Distribution of Adjacent Networks Among Geo-objects and Its Significance

地理对象关系网尤其是邻近关联生成的网络是客观存在的,有着基本的拓扑结构,最重要的拓扑性质是其度及度分布。在进行空间数据计算分析时,人们往往进行邻近关联操作(分析)。为了进一步加深对地理对象邻近关联的认识,以生态斑块邻近关系网为案例,近似测算客观地理对象邻近关系网的度分布。结果表明:度分布在尺度、时间和地域上是保持一致的;在特定范围,度分布服从幂律分布,地理对象邻近关联网络具有无标度特性。另外,度与邻近对象的属性具有一定相关性。

Relationship networks of geo-objects,especially the networks generated by adjacent associations,exist objectively and have a basic topological structure.The most important topological properties are degree and degree distribution.When calculating and analyzing spatial data,researchers often carry out adjacent association operations(analysis).To deepen the understanding of the adjacent relationships of geo-objects,we take the relationship networks of ecological patches as an example to approximately estimate the degree distribution of the adjacent networks of objective geo-objects.The result shows that the degree distribution is consistent in scales,times,and zones.The degree distribution follows the powerlaw distribution in a certain range.And the adjacent relationship networks have scale-free properties.In addition,a correlation exists between the degree of a geo-object and the properties of its neighbors.