Applicability and simplification study of patch level landscape metrics based on GLC30
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摘要: 斑块是景观格局的基本组成单元,斑块级别指标是量化研究斑块形态的重要基础.目前斑块描述指标冗余纷杂,因此拟对现有的斑块级别指标进行分析,指出指标本身的适用性,并利用相关性分析和主成分分析方法实现斑块级别形态描述指标的综合和简化.在对11个斑块级别指标进行适用性分析的基础上,采用30 m空间分辨率全球地表覆盖类别数据(GLC30)进行实验,利用2种分析方法对除面积和周长外的9个复合指标进行了简化分析.实验结果表明,回旋半径和支撑半径这2个指标可以在较大程度上区分斑块形态.本文研究方法和实验结果为量化研究景观格局尺度效应积累了经验.Abstract: Patch is the basic unit in landscape pattern and patch metrics constitute an important basis for quantifying patch morphology. Presently there are many patch level metrics and most of them have certain redundancy. Therefore for the purpose of applying patch metrics reasonably, the objectives of this paper are the applicability analysis of patch morphological metrics, the multiple-index analysis based on the patch morphological metrics and reducing many patch metrics to several patch metrics to express different patches. by the correlation analysis and principal component analysis. The experiment is on the basis of applicability analysis about 11 patch morphological metrics with global land cover data ( GLC30 ) , and all the metrics except area and perimeter are simplified by the two analysis methods. The experiment result shows that the two patch metrics, radius of gyration and support radius, could express and describe the different morphological patches well. The experimental results could serve as an important reference for the quantitative study of the scale effect in the landscape pattern.
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Key words:
- GLC30 /
- landscape pattern metrics /
- patch /
- principal component analysis /
- correlation analysis
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