[GRASS-user] r.clump with diagonal cells

Johannes Radinger johannesradinger at gmail.com
Mon Jan 13 03:39:05 PST 2014


Dear all,

I just tried r.clump on a rastarized river with alternating patches of good
and bad habitat (values 1 and 2). However, due to its linear structure, many
cells of the same habitat patch are often only diagonally connected. So this
is a case where r.clump does not work (as stated in its manual).

So, as a suggestion, it'd be nice if also diagonal cells could be
considered by r.clump (e.g. by setting a flag).

...or maybe someone of you has another idea to how to get unique values for
each discrete patch (also diagonally connected cells of homogeneous habitat
quality).

FYI r.clump has been tested on GRASS7.

best regards,
Johannes
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