[GRASS-user] Does v.kernel have to take 16+ hours?

+1 for me too. Otherwise very confusing.

Michael


C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)

www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu

On Dec 10, 2012, at 1:19 AM, <grass-user-request@lists.osgeo.org>
wrote:

From: Moritz Lennert <mlennert@club.worldonline.be>

Subject: Re: [GRASS-user] Does v.kernel have to take 16+ hours?

Date: December 10, 2012 1:03:46 AM MST

To: Markus Metz <markus.metz.giswork@gmail.com>

Cc: <grass-user@lists.osgeo.org>

On 07/12/12 17:16, Markus Metz wrote:

On Thu, Dec 6, 2012 at 10:19 PM, Aren Cambre<aren@arencambre.com> wrote:

OK, I think I get it now. After you’ve hit 4 SDs (or even arguably 3 SDs!)
the contribution of more points to that square fades to almost nothing
without extreme clusters of points.

Right.

Seems like this ought to be clarified in the UI and documentation? Should I
file an enhancement request?

I would rather have the option ‘stddeviation’ renamed to ‘radius’,
kernel radius in map units, which it actually is currently for all
kernels but gaussian, and internally adjust standard deviation instead
of radius for the gaussian kernel. I guess that the kernel radius is
of more importance to users than the standard deviation. Makes sense?

+1

Moritz

Done in r54271.

On Mon, Dec 10, 2012 at 6:00 PM, Michael Barton <michael.barton@asu.edu> wrote:

+1 for me too. Otherwise very confusing.

Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu

On Dec 10, 2012, at 1:19 AM, <grass-user-request@lists.osgeo.org>
wrote:

From: Moritz Lennert <mlennert@club.worldonline.be>
Subject: Re: [GRASS-user] Does v.kernel have to take 16+ hours?
Date: December 10, 2012 1:03:46 AM MST
To: Markus Metz <markus.metz.giswork@gmail.com>
Cc: <grass-user@lists.osgeo.org>

On 07/12/12 17:16, Markus Metz wrote:

On Thu, Dec 6, 2012 at 10:19 PM, Aren Cambre<aren@arencambre.com> wrote:

OK, I think I get it now. After you've hit 4 SDs (or even arguably 3 SDs!)
the contribution of more points to that square fades to almost nothing
without extreme clusters of points.

Right.

Seems like this ought to be clarified in the UI and documentation? Should I
file an enhancement request?

I would rather have the option 'stddeviation' renamed to 'radius',
kernel radius in map units, which it actually is currently for all
kernels but gaussian, and internally adjust standard deviation instead
of radius for the gaussian kernel. I guess that the kernel radius is
of more importance to users than the standard deviation. Makes sense?

+1

Moritz

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