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?
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.
Thanks in advance!
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
On Mon, Mar 15, 2010 at 3:39 AM, maning sambale
<emmanuel.sambale@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...
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.
Thanks for clarifying. So r.li it is.
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...
That's my line of thinking at the moment.
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
The differences: r.le is the first implementation but
unmaintained.
fwiw, as far as what "unmaintained" means, we'll (or I'll) try and
fix obvious functionality bugs if people point them out, but the
original authors have moved on to new challenges and no one has
volunteered to formally take over looking after them. So those
modules (and a number of i.* ones) are not a focus of active
development, but the users who rely on them should not feel
completely abandoned.