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Examining the satellite-detected urban land use spatial patterns using multidimensional fractal dimension indices

机译:使用多维分形维数指标检验卫星探测到的城市土地利用的空间格局

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摘要

Understanding the spatial patterns of urban land use at both the macro and the micro levels is a central issue in global change studies. Due to the nonlinear features associated with land use spatial patterns, it is currently necessary to provide some distinct analysis methods to analyze them across a range of remote sensing imagery resolutions. The objective of our study is to quantify urban land use patterns from various perspectives using multidimensional fractal methods. Three commonly used fractal dimensions, i.e., the boundary dimension, the radius dimension, and the information entropy dimension, are introduced as the typical indices to examine the complexity, centrality and balance of land use spatial patterns, respectively. Moreover, a new lacunarity dimension for describing the degree of self-organization of urban land use at the macro level is presented. A cloud-free Landsat ETM+ image acquired on 17 September 2010 was used to extract land use information in Wuhan, China. The results show that there are significant linear relationships represented by good statistical fitness related to these four indices. The results indicate that rapid urbanization has substantially affected the urban landscape pattern, and different land use types show different spatial patterns in response. This analysis reveals that multiple fractal/nonfractal indices provides a more comprehensive understanding of the spatial heterogeneity of urban land use spatial patterns than any single fractal dimension index. These findings can help us to gain deeper insight into the complex spatial patterns of urban land use.
机译:在宏观和微观两个层面上了解城市土地利用的空间格局是全球变化研究的核心问题。由于与土地利用空间格局有关的非线性特征,目前有必要提供一些独特的分析方法,以在各种遥感影像分辨率范围内对它们进行分析。我们研究的目的是使用多维分形方法从各个角度量化城市土地利用模式。引入三种常用的分形维数,即边界维数,半径维数和信息熵维数作为典型指标,分别考察土地利用空间格局的复杂性,集中性和平衡性。此外,提出了一个新的缩影维度,用于从宏观层面描述城市土地利用的自组织程度。 2010年9月17日获取的无云Landsat ETM +图像用于提取中国武汉的土地利用信息。结果表明,与这四个指标相关的良好统计适应性代表着显着的线性关系。结果表明,快速的城市化已对城市景观格局产生了重大影响,不同的土地利用类型表现出不同的空间格局。该分析表明,与任何单个分形维数索引相比,多个分形/非分形指数对城市土地利用空间格局的空间异质性提供了更全面的理解。这些发现可以帮助我们更深入地了解城市土地利用的复杂空间格局。

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