The standard computing formula for contagion
202
only applies when a particular method is used to
reduce raster map data to an attribute adjacency
matrix. Recognizing the need to compare contagion
values obtained from the literature, it seems prudent
to document the method used to construct the
attribute adjacency table whenever a contagion
index is reported. It may also be worthwhile to
simply report the entire adjacency matrix, for this
will enable others to fit more complicated contagion
models such as those described by Gardner
and O’Neill (1991), Pastor and Broschart (1990),
and Cressie (1993).
An alternative, single-valued contagion estimator
that is unaffected by the data reduction method
is the sum of the main diagonal (“same-class”) elements
of the attribute adjacency matrix (Wickham
\ and Riitters 1995).
Acknowledgemenls
The research described in this article has been
funded in part by the United States Environmental
Protection Agency through Interagency
Agreement DW649
不需要完全准确的翻译、大概意思差不多就可以了 总之别像那些翻译软件翻译出来的无厘头汉语就成~，谢谢了
我晕 一楼你那个就是翻译软件翻译的结果 说了不要那样的~