Hi Markus,
I do have the 3rd edition of your book, but it seems like r.param.scale is not in your book (at least I don't see a reference in the index). Since we do have lidar, I'd like to take a look at Helena's IEEE paper. Is it (or a preprint) available on the internet? Also I wanted to know what the illustration is showing. It looks like curvature is on the left and slope on the right which are animated to based on some parameter?
Bob
Bob Moskovitz
Seismic Hazard Evaluation Project
California Geological Survey
http://gmw.consrv.ca.gov/shmp
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-----Original Message-----
From: neteler.osgeo@gmail.com
[mailto:neteler.osgeo@gmail.com]On Behalf
Of Markus Neteler
Sent: Wednesday, June 04, 2008 12:28 PM
To: Moskovitz, Bob
Cc: Grass-User (E-mail)
Subject: Re: [GRASS-user] slope curvature algorithm - adjust
the kernel
size
Hi Bob,
below answers from Helena and Jaro
Markus
On Wed, Jun 4, 2008 at 2:27 AM, <hmitaso@ncsu.edu> wrote:
> Jaro Hofierka wrote:
>> I think r.param.scale is the module that this guy is looking for.
>
> that is right. In case he is working with the latest lidar data for
> California, I think we have a nice example in the book for
r.param.scale
> for the high resolution data showing what neighborhood you
need to get
> meaningful curvature maps from lidar-based DEM.
>
> If he has the bare earth point cloud available he can get
even better
> curvature maps at an appropriate level of detail while keeping the
> resolution high from v.surf.rst (I think we have that
described in the
> IEEE paper 2005 and here is an illustration)
> http://skagit.meas.ncsu.edu/~helena/measwork/jockeys/a57tenslpcn.gif
>
> Helena
>
On Tue, Jun 3, 2008 at 10:23 PM, Moskovitz, Bob
<Bob.Moskovitz@conservation.ca.gov> wrote:
> Hello list,
>
> A coworker was asking me if I know of a slope curvature
algorithm that lets
> you adjust the kernel size. Does GRASS have such a program?
>
> Bob
>
> Bob Moskovitz
> Seismic Hazard Zonation Project
> California Geological Survey
> http://www.conservation.ca.gov/cgs/shzp
>
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