[Qgis-developer] Processing with raster files > 4GB

[Carlos López PSIG]

Hi Andreas,
I also had problems to reclassify BIGTIFF with SAGA and GRASS!
Finally I used GDAL!

Best regards,


* <http://www.psig.es>*

*Carlos López Quintanilla*

www.psig.es
carlos.lopez at psig.es
+34 699.680.261



2014-11-19 9:05 GMT+01:00 Andreas Neumann <a.neumann at carto.net>:

> Hi,
>
> I tried various tools, e.g.
>
> * SAGA reclassify
> * GRASS r.mapcalc
>
> Both work fine on smaller data sets, but fail on big data sets.
>
> This is on Win7 64bit, with the OSGeo4W installer. I have 8gb RAM and 40GB
> disk free on C:, more free space on other disks where the data resides.
>
> I am not totally sure if it is the Bigtiff issue or some other issue. It
> is just a guess that maybe I am hitting a limit with tiff. It is not fully
> transparent to me what Processing is doing in the background (what file
> formats with what options it creates).
>
> It may also be an issue with SAGA or GRASS directly.
>
> Thanks if you know anything,
> Andreas
>
> Am 2014-11-18 21:15, schrieb Giovanni Manghi:
>
>  Hi,
>>>
>>> I am having a lot of troubles with large raster files and processing.
>>>
>>> The intermediate results can go >4GB. Processing stops with not so
>>> helpful error messages.
>>>
>>> I wonder if processing is hitting the 4GB limit. Can I force processing
>>> to use the BIGTIFF option or a raster format that can handle >4GB files?
>>>
>>>
>>
>>
>> Hi Andreas, what tool specifically?
>>
>> cheers
>>
>> -- Giovanni --
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