Details Ticket 2104


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Serial Number 2104
Subject r.le.pixel improvement
Area wish6
Queue grass
Requestors m.wegmann@web.de
Owner none
Status resolved
Last User Contact Tue Jul 31 14:19:50 2007 (1 yr ago)
Current Priority 20
Final Priority 70
Due No date assigned
Last Action Tue Jul 31 14:19:50 2007 (1 yr ago)
Created Tue Sep 16 22:11:30 2003 (5 yr ago)

Transaction History Ticket 2104


Tue, Sep 16 2003 22:11:30    Request created by guest  
Subject: r.le.pixel improvement

Platform: GNU/Linux/i386
grass obtained from: Trento Italy site
grass binary for platform: Compiled from Sources
GRASS Version: 5.0.2 + r.series

On Mon, Sep 15, 2003 at 03:22:27PM +0200, Martin Wegmann wrote: 
> Hello,  
>  
> I did some analysis with r.le (especially r.le.pixel) for an ecological  
> project. And I would like to suggest another option in r.le, when doing  
> anaylsis in different scales (e.g. 1, 2, n pixel distance included in the 
> calculation), it would be very useful to do a " ring-analysis" instead of 
a  
> radius-analysis.  
> With the latter I can tell what's the e.g. mean of the core pixel plus the
> pixel in a radius of 2 pixels like 
>  
> a a a a a 
> a b b b a 
> a b x b a 
> a b b b a 
> a a a a a 
>  
> but I can not tell what the mean in a certain distance is. this would be  
> pretty interesting for ecological research, e.g. if a species if affected 
by  
> the whole mean or by the mean of PP in a distance of x meter.  
>  
> a a a a a 
> a         a 
> a    x    a 
> a         a 
> a a a a a 
>  
> I hope I did not miss a reference to such a tool in the manual ;-) 
>  
> cheers Martin 
 
Wed, Sep 17 2003 10:38:32    Priority changed to 20 by bernhard  
Fri, Sep 29 2006 14:20:07    Area changed to wish6 by msieczka  
Wed, Nov 15 2006 00:02:35    Mail sent by hamish_nospam@yahoo.com  
Return-Path <hamish_nospam@yahoo.com>
Delivered-To grass-bugs@lists.intevation.de
Date Wed, 15 Nov 2006 12:02:16 +1300
From Hamish <hamish_nospam@yahoo.com>
To wegmann@biozentrum.uni-wuerzburg.de
Cc grass-dev@grass.itc.it, grass-bugs@intevation.de
Subject Re: [bug #2104] [GRASS-dev] r.neighbors modification
Message-Id <20061115120216.04e0f4c0.hamish_nospam@yahoo.com>
In-Reply-To <200611141730.28599.wegmann@biozentrum.uni-wuerzburg.de>
References <200611141730.28599.wegmann@biozentrum.uni-wuerzburg.de>
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Martin Wegmann wrote:
> BTW I posted such a wish quite a while ago but for the inactive r.le
> module
> http://www.intevation.de/rt/webrt?serial_num=2104


r.le is not totally "inactive", it has been updated recently to (at least)
be fully functional.

new filters should probably be added to the newly commited r.li however.



Hamish


Tue, Jul 31 2007 14:19:50    Status changed to resolved by mneteler  
Tue, Jul 31 2007 14:19:50    Mail sent by mneteler  
[r.neighbors updated by glynn]

>the command works like
>
>r.neighbors -c input=name output=name method=average size=5
>and the output would be the average of values in a ring of 5x5 around the
>center pixel, wouldn't it?
>
>then I can drop my r.mapcalc script and close one old wish report related to
>r.le but solved via r.neighbors
>(http://www.intevation.de/rt/webrt?serial_num=2104&display=History) - thanks
>a lot!
>
>Martin 
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