[GRASS-user] r.le or r.li?

Markus Neteler neteler at osgeo.org
Fri Mar 26 17:27:07 EDT 2010

On Mon, Mar 15, 2010 at 3:39 AM, maning sambale
<emmanuel.sambale at gmail.com> wrote:
> Hi,
> I'm doing some patch stats analysis (largest patch, edge and interior
> patches).   There are meta modules available in grass r.le and r.li.
> The seem to provide similar set of patch statistics calculations.  I
> want to know the basic difference of the two.  r.li seems to be very
> similar to fragstats or is it?

That's right.
The differences: r.le is the first implementation but unmaintained.
r.li is a new implementation and somewhat maintained (just fixed
a bug today). Hopefully more indices are added in future.

> Follow up inquiry, how do I include the the patch stats to a vector
> polygon?  For example, I have a watershed polygon and landcover
> raster.  I want to include as an attribute, the largest interior patch
> within each sub-basin.

... sorry, no idea. In any case "think raster" for this module family...


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