[Freegis-list] free gis for counting trees

[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 wouldnŽt mention this commercial software here, if  the
>    idea behind it wouldnŽt 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

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