A mathematical comment on the formulae for the aggregation index and the shape index

被引：30

作者：

Bogaert, J ^{[1
]}

Myneni, RB

Knyazikhin, Y

机构：

[1] Boston Univ, Dept Geog, Climate & Vegetat Res Grp, Boston, MA 02215 USA

[2] Univ Antwerp, Dept Biol, Res Grp Plant & Vegetation Ecology, B-2610 Antwerp, Belgium

来源：

LANDSCAPE ECOLOGY | 2002年 / 17卷 / 01期

关键词：

aggregation index; index redundancy; landscape metric; perimeter; pixel edge; pixel geometry; shape index; spatial pattern;

D O I：

10.1023/A:1015204923187

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

In a recent paper [Landscape Ecol. 15: 591-601 (2000)] He et al. described an aggregation index AI(i), to measure pixel aggregation within a single class i. We show that the commonly used shape index SIi is related to the proposed aggregation metric as SIi = Phi(A(i)) + AI(i)(1 - Phi(A(i))), with Phi(A(i)) dependent on class area A(i) only. Moreover, it is shown that the normalized shape index, SIi*, equals (1 - AI(i)). We conclude that AI(i) does not provide any information not provided by SIi, or SIi*.

引用

页码：87 / 90

页数：4

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