[Qgis-user] (no subject) - Compressing Raster

[Etienne Tourigny]

On Tue, Jul 29, 2014 at 1:10 PM, Alex Mandel <tech_dev at wildintellect.com>
wrote:

> On 07/29/2014 01:45 AM, Peter Versteeg wrote:
> > thank you very much for the email.
> >
> >
> >
> > I think I am almost there. I have set the compression to LZW and did a
> > export and I did a export on high compression. Both are still really big.
> >
> >
> >
> > in your first mail you explained about:
> >
> >
> >
> >             The type of number stored dictates a large amount of
> overhead,
> > there is
> >                 a huge difference between Integer and Float.
> >
> >                 -co COMPRESS=LZW  -ot Int16
> >
> >                 See http://www.gdal.org/gdal_translate.html for options.
> > Pick the
> >                 smallest type of number storage that holds your data
> > correctly. Most
> >                 GDAL tools will default to Float, that is likely the
> > difference.
> >
> >
> >
> > In the save raster as window where i also set the compress to LZW i did
> try
> > to ad a line but i do not know what to type.
> >
> > name: Int value 16 or name ot value int16 all do not work.
> >
> >
> >
> > Can you tell me what line to write
> >
> >
> >
> > gr Peter
> >
>
> As I said in my previous email:
> If that still isn't enough use GDAL Translate found on the Raster menu
> under Conversion. There you will be able to set all the possible options.
>
> Basically the options are not in the Save As dialog. I will talk to the
> developers about adding more options.
>

You can do pretty much the same things as in the GDAL Translate tool - see
the "Creation Options" group box. What is missing exactly?


> Please reply to the list when replying.
>
> Thanks,
> Alex
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