[Qgis-user] singelband pseudocolor takes a very long time to classify a 21698x24647 raster

[Etienne Tourigny]

On Mon, Aug 20, 2012 at 11:52 AM, G. Allegri <giohappy at gmail.com> wrote:
> Hi Etienne,
>
>> which ramp(s) are you using, and how many classification steps?
>
>
> any ramp (qgis defaults and cpt-city behave the same)
>
>>
>>
>> Can you test in linux?
>
>
> I will do as soon as I restore my Ubuntu VM...
>
>>
>>
>> Can you make the file available?
>
>
> Mmm, I suppose no, both for license issues and being a huge file (various
> GBs).
> I will try with a subset.

Hi, I can understand that.  Just to have an idea, can you post
gdalinfo output or at least give some specifics so I can make a
similar file (i.e. resolution, type, range)

Etienne
>
> giovanni
>
>
>
>
>>
>>
>> Etienne
>>
>> On Mon, Aug 20, 2012 at 7:50 AM, G. Allegri <giohappy at gmail.com> wrote:
>> > I'm testing the new raster styling with qgis-dev (from osgeo4w) on a
>> > Windows
>> > 7 64bit machine.
>> > My single band raster (21698x24647) takes a very long time to do the
>> > color
>> > ramp classification with singleband pseudocolor. So much time that I
>> > ended
>> > it before completion (minutes after starting it).
>> > In QGis 1.8 the (not customizable) Pseudo Color option rendered
>> > istantaneously.
>> >
>> > The new features in raster simbology are really awesome!
>> > Thanks a lot,
>> > giovanni
>> >
>> >
>> > _______________________________________________
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>> > Qgis-user at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/qgis-user
>> >
>
>