Journal of Geo-information Science >
Analysis of Multi-scale Effect of Landscape Indices of Classical Landforms in Yuncheng City,Shanxi Province
Received date: 2011-12-01
Revised date: 2012-05-27
Online published: 2012-06-25
Landscape indices,as quantitative description to landform characteristics,have obvious scale effect and have being used widely. Researches on the scale effect of landscape indices have important significance in understanding the relationship between pattern and scale of landforms. Based on TM images,we choose four different geomorphologic types,i.e. plain,hill,mountain and complex landform in Yuncheng City,Shanxi Province,and seven landscape indices to analyze the multi-scale effects. Firstly,we did the resample from landform images to get ten grain sizes and twelve extent sizes; secondly,according to the response curves of landscape indices of different grain and extent sizes to the four landforms,we analyzed the grain effect and extent effect of seven common landscape indices. The result showed that: patch density (PD),landscape shape index (LSI),patch cohesion index (COHESION) show a gradual downward trend with increasing of grain size with different geomorphologic types,largest patch index (LPI),perimeter-area fractal dimension (PAFRAC),landscape contagion (CONTAG) and Shannon diversity index (SHDI) have no significant changes. All landscape indices showed complicate changes with the changed spatial extent in different geomorphologic types. Landscape shape index (LSI) gradually declined with the increasing spatial extent,the other landscape indices curve changed rather complicatedly in the smaller spatial extent and showed no significant changes in the larger spatial extent. In addition,according to the different landforms,the landscape indices have obvious distinction in different grain and extent sizes,so we can distinct the complexity of different landforms by landscape indices.
Key words： landscape indices; grain size; landform; extent; scale effect
BI Rutian, GAO Yan . Analysis of Multi-scale Effect of Landscape Indices of Classical Landforms in Yuncheng City,Shanxi Province[J]. Journal of Geo-information Science, 2012 , 14(3) : 338 -343 . DOI: 10.3724/SP.J.1047.2012.00338
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