[GRASS-user] slope curvature algorithm - adjust the kernel size

[Moskovitz, Bob]

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

CONFIDENTIALITY NOTICE: This communication is intended only for the use of the individual or entity to which it is addressed. This message contains information from the State of California, California Geological Survey, which may be privileged, confidential and exempt from disclosure under applicable law, including the Electronic Communications Privacy Act. If the reader of this communication is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited.



> -----Original Message-----
> From: neteler.osgeo at gmail.com 
> [mailto:neteler.osgeo at 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 at 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 at 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
> >
> 
> -- 
> Open Source Geospatial Foundation
> http://www.osgeo.org/
> http://www.grassbook.org/
>