[GRASS-user] i.segment.stats memory usage error

[Pietro]

On Fri, Nov 4, 2016 at 3:51 PM, Moritz Lennert <mlennert at club.worldonline.be
> wrote:

> On 04/11/16 12:24, James Duffy wrote:
>
>> Moritz, have you seen the reply on the bug rep?
>> https://trac.osgeo.org/grass/ticket/3197
>> <https://trac.osgeo.org/grass/ticket/3197>
>>
>> Do you think the alternative r.univar2 could be used in your function?
>>
>
> Yes, I saw the answer. As Pietro said, r.univar2 was not ported to grass7
> and I don't have time for that now. I also don't really know why the module
> is faster, but ideally the changes should be merged into r.univar instead
> of creating a second, similar module.
>

r.univar2 was developed for grass7. Anyway it seems that now there are
better tools for this task.


> @Pietro: could you maybe explain how you changed the logic to see how
> difficult it would be to integrate this into r.univar ?
>

It starts looking how many zones exists and how many cells per zone are
present in the region. In this way it allocates only what is needed, and
using the extended statistics free the memory after each zone is done.
Probably this free rule should be moved also in the case user is not
computing the extending statistics. In this way I was able to characterize
the zones of the i.segment module.

All the best

Pietro
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