distance between patch edges

[Roy Sanderson]

Dear All

I've got a raster map with a number of different patches (habitat blocks)
and need to calculate the shortest distance from the edge of each patch to
the edge of all other patches.  Using r.volume (in combination with other
commands) is OK to calculate centroid distances, but not edge distances.
r.le.dist works only for one nearest patch (M4 option) or a specific group
(M9), not all patches.  Any suggestions?

TIA
Roy

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Roy Sanderson
Centre for Land Use and Water Resources Research
Porter Building
University of Newcastle
Newcastle upon Tyne
NE1 7RU
United Kingdom

Tel: +44 191 222 7789
Fax: +44 191 222 6563
r.a.sanderson at newcastle.ac.uk
URL: http://www.cluwrr.ncl.ac.uk
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