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Today's Topics:

1. Re: free gis for counting trees (landconsult at freenet.de)
2. Re: free gis for counting trees (landconsult at freenet.de)
3. Re: free gis for counting trees (Bernhard Reiter)
4. Re: free gis for counting trees (Bernhard Reiter)
5. hardware requirements for linux-based GIS (Tim Greenhow)
6. Re: hardware requirements for linux-based GIS (Daniel Morissette)

> ATTACHMENT part 3.1 message/rfc822 
Subject: Re: [Freegis-list] free gis for counting trees
Date: Thu, 30 Sep 2004 16:31:17 +0200
To: freegis-list at intevation.de
From: "landconsult at freenet.de" 

Another free image classification software (for satellite images, maybe not adequate for high resolution aerial photographs ...) is Silvics.
It doesn´t include GIS functianlity ...
http://eurolandscape.jrc.it/forest/silvics/

Markus

Paolo Cavallini schrieb:

-----BEGIN PGP SIGNED MESSAGE-----Hash: SHA1grass 5.7pcAt 21:07, mercoledì 29 settembre 2004, Eduardo Patto Kanegae has probably written:  

Hi all,I need to do some tests using high resolution aero-infrared photographiesto count the number of trees for a given eucalyptus forest area.The hard thing is how to count trees when they are not so young? I mean,there are some case where 2 or 3 trees sounds like 1 only tree for variousclassification algorithms...Can anybody recommend me a free gis that could do that?thanks in advance.Eduardo Patto Kanegaehttp://www.webmapit.com.brUIN: 303747254Treinamento em UMN MapServer -http://www.webmapit.com.br/ptbr/?menuoption=mapserver Fórum MapServerBrasil - http://mapserver.cttmar.univali.br/forum***Fim da Mensagem / End of Message ***_______________________________________________Freegis-list mailing listFreegis-list at intevation.dehttps://intevation.de/mailman/listinfo/freegis-list    

- -- Paolo Cavallinicavallini at faunalia.it            www.faunalia.itPiazza Garibaldi 5 - 56025 Pontedera (PI), Italy   Tel: (+39)348-3801953GPG key @: hkp://wwwkeys.pgp.net http://www.pgp.net/wwwkeys.html https://www.biglumber.comOnly free software: www.gnu.org / www.linux.org-----BEGIN PGP SIGNATURE-----Version: GnuPG v1.2.4 (GNU/Linux)iD8DBQFBW5hh/NedwLUzIr4RAqaFAKCW9FrHXdM8SvcyhlNYGXyIDq6UrwCgtfi9JM7jzslMzVccxKh0+oF3G7Q==2c7v-----END PGP SIGNATURE-----_______________________________________________Freegis-list mailing listFreegis-list at intevation.dehttps://intevation.de/mailman/listinfo/freegis-list  

> ATTACHMENT part 3.2 message/rfc822 
Subject: Re: [Freegis-list] free gis for counting trees
Date: Thu, 30 Sep 2004 16:35:26 +0200
To: freegis-list at intevation.de
From: "landconsult at freenet.de" 

If I understood you, Eduardo right, you need a image processing software to detect the crown of single trees in your infrared image. 
Well, if Grass 5.7 can relly do this, please let me know, because I doubt, that there is a free image processing system to delineate tree crowns .... 
e.cognition is a commercial software package that has been developed to classify images using object and knowledge based algorithms. There is a derivate of it called forester,  co-developed by the Forstry Commision in the UK, but the standard version of e.cognition and the forester are too expensive (unfortunately more than some 20K Euros .... but I wouldn´t mention this commercial software here, if  the idea behind it wouldn´t be really good and convincing ...) 
Nevertheless e.cognition is offering a trial version (I think it is limited to a certain size of the files to be processed), and maybe it is good enough to help you with your problem. 
http://www.definiens-imaging.com/down/trial.htm 

Markus

Paolo Cavallini schrieb:

-----BEGIN PGP SIGNED MESSAGE-----Hash: SHA1grass 5.7pcAt 21:07, mercoledì 29 settembre 2004, Eduardo Patto Kanegae has probably written:  

Hi all,I need to do some tests using high resolution aero-infrared photographiesto count the number of trees for a given eucalyptus forest area.The hard thing is how to count trees when they are not so young? I mean,there are some case where 2 or 3 trees sounds like 1 only tree for variousclassification algorithms...Can anybody recommend me a free gis that could do that?thanks in advance.Eduardo Patto Kanegaehttp://www.webmapit.com.brUIN: 303747254Treinamento em UMN MapServer -http://www.webmapit.com.br/ptbr/?menuoption=mapserver Fórum MapServerBrasil - http://mapserver.cttmar.univali.br/forum***Fim da Mensagem / End of Message ***_______________________________________________Freegis-list mailing listFreegis-list at intevation.dehttps://intevation.de/mailman/listinfo/freegis-list    

- -- Paolo Cavallinicavallini at faunalia.it            www.faunalia.itPiazza Garibaldi 5 - 56025 Pontedera (PI), Italy   Tel: (+39)348-3801953GPG key @: hkp://wwwkeys.pgp.net http://www.pgp.net/wwwkeys.html https://www.biglumber.comOnly free software: www.gnu.org / www.linux.org-----BEGIN PGP SIGNATURE-----Version: GnuPG v1.2.4 (GNU/Linux)iD8DBQFBW5hh/NedwLUzIr4RAqaFAKCW9FrHXdM8SvcyhlNYGXyIDq6UrwCgtfi9JM7jzslMzVccxKh0+oF3G7Q==2c7v-----END PGP SIGNATURE-----_______________________________________________Freegis-list mailing listFreegis-list at intevation.dehttps://intevation.de/mailman/listinfo/freegis-list  

> ATTACHMENT part 3.3 message/rfc822 
Subject: Re: [Freegis-list] free gis for counting trees
Date: Thu, 30 Sep 2004 19:05:09 +0200
To: freegis-list at intevation.de
From: Bernhard Reiter 

On Thu, Sep 30, 2004 at 04:31:17PM +0200, landconsult at freenet.de wrote:
> Another free image classification software (for satellite images,
> maybe not adequate for high resolution aerial photographs ...) is
> Silvics.

The page itself does not offer a license or source code.
Are you sure it is Free Software?

http://www.freegis.org/about.en.html

Free software is a matter of the users' freedom to run, copy,
distribute, study, change and improve the software.

> It doesnÅ½t include GIS functianlity ...
> [1]http://eurolandscape.jrc.it/forest/silvics/

> ATTACHMENT part 3.3.2 application/pgp-signature 

> ATTACHMENT part 3.4 message/rfc822 
Subject: Re: [Freegis-list] free gis for counting trees
Date: Thu, 30 Sep 2004 19:09:32 +0200
To: freegis-list at intevation.de
From: Bernhard Reiter 

On Thu, Sep 30, 2004 at 04:35:26PM +0200, landconsult at freenet.de wrote:
> If I understood you, Eduardo right, you need a image processing
> software to detect the crown of single trees in your infrared image.
> Well, if Grass 5.7 can relly do this, please let me know, because I
> doubt, that there is a free image processing system to delineate tree
> crowns ....
> e.cognition is a commercial software package that has been developed
> to classify images using object and knowledge based algorithms. There
> is a derivate of it called forester, co-developed by the Forstry
> Commision in the UK, but the standard version of e.cognition and the
> forester are too expensive (unfortunately more than some 20K Euros

(Note that Free Software can also be "commercial".
http://intevation.de/%7Ejan/infos/dont_oppose_commercial_and_free_software.en.html
)

> .... but I wouldnÅ½t mention this commercial software here, if the
> idea behind it wouldnÅ½t be really good and convincing ...)
> Nevertheless e.cognition is offering a trial version (I think it is
> limited to a certain size of the files to be processed), and maybe it
> is good enough to help you with your problem.

GRASS is quite powerful and can be considered commercial,
as some people sell support and others use it for business.
I do not know about how good it is for the task of delineate tree crowns,
but if it is not up to it yet, it can be improved.
And if someone does not want to spend the money for the proprietary
software, why not contracting someone to extend GRASS for the task?

Bernhard

-- 
Professional Service around Free Software (intevation.net) 
Experts for complex webmapping! In business since 1999:
http://intevation.net/services/gis/webmapping.en.html
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> ATTACHMENT part 3.4.2 application/pgp-signature 

> ATTACHMENT part 3.5 message/rfc822 
Subject: [Freegis-list] hardware requirements for linux-based GIS
Date: Thu, 30 Sep 2004 09:55:02 +0200
To: freegis-list at intevation.de
From: Tim Greenhow 

I am very interested in exploring open-source GIS on Linux, but I am 
truly a newbie when it comes to Linux. In my search for a new laptop 
computer I find some salesmen blithely tell me that "sure, this machine 
can run Linux, though we don't normally sell it with that OS installed." 
But one, trying to sell me a particularly expensive machine, tells me 
that of all the copumters he has on stock, this is the only one that has 
been tested and certified suitable for Linux. Others will have problems 
with certain Linux commands and functions, he tells me. He assures me 
that he is not referring to CPU speed, harddisk or RAM size.
My question therefore is simply:: what are the basic hardware 
requirements needed for running Linux? What am I supposed to check for, 
and how different are the requirements of different Linux versions? Note 
that I would like to try a variety of GIS programs, among them GRASS.
Any help would be gratefully received.
Tim

> ATTACHMENT part 3.6 message/rfc822 
Subject: Re: [Freegis-list] hardware requirements for linux-based GIS
Date: Thu, 30 Sep 2004 14:42:52 -0400
To: Tim Greenhow 
CC: freegis-list at intevation.de
From: Daniel Morissette 

Tim Greenhow wrote:
> I am very interested in exploring open-source GIS on Linux, but I am 
> truly a newbie when it comes to Linux. In my search for a new laptop 
> computer I find some salesmen blithely tell me that "sure, this machine 
> can run Linux, though we don't normally sell it with that OS installed." 
> But one, trying to sell me a particularly expensive machine, tells me 
> that of all the copumters he has on stock, this is the only one that has 
> been tested and certified suitable for Linux. Others will have problems 
> with certain Linux commands and functions, he tells me. He assures me 
> that he is not referring to CPU speed, harddisk or RAM size.
> My question therefore is simply:: what are the basic hardware 
> requirements needed for running Linux? What am I supposed to check for, 
> and how different are the requirements of different Linux versions? Note 
> that I would like to try a variety of GIS programs, among them GRASS.

I can't speak for the GRASS requirements specifically (I think it should 
run on any decent machine but I may be wrong), but with respect to 
running Linux on various laptop models, you'll find tons of useful 
information at:

http://www.linux-laptop.net/

Most of the times the problems you'll encounter with Linux on laptops is 
lack of support for power management (hibernation won't work) and 
possible lack of good drivers for the laptop's builtin modem (WinModem, 
bad bad), sound card (sometimes), wireless adapter (often), and 
sometimes lack of an optimized X11 driver for the display.

In the worst case scenarios, all of the above will be hard to find or 
unavailable, but with more recent Linux distributions, and more recent 
laptops that seems to be standardizing to well-known hardware, you may 
be able to just load the install CD's, click-click-click and almost 
everything will be magically be detected and run properly.

The best is to look for the model/brand that you plan to purchase on 
linux-laptop.net before you buy.

Daniel
-- 
------------------------------------------------------------
Daniel Morissette dmorissette at dmsolutions.ca
DM Solutions Group http://www.dmsolutions.ca/
------------------------------------------------------------

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