[Gvsig_english] Problem loading big raster file.

[Nacho]

Hi Ben
gvSIG can build overview with the option Raster Layer/Overviews. 
You can choose the number of levels, ratio and resampling method with the preferences dialog. 
Depending on the format the process will rewrite the image, be careful.

gvSIG will show rasters with overviews faster. This tool uses a gdal dataset internally. 

http://www.gdal.org/classGDALDataset.html#2aa6f88b3bbc840a5696236af11dde15

Regards,
Nacho

El mié, 03-03-2010 a las 09:06 +0000, Benjamin Ducke escribió:
> Hi Nacho,
> 
> could you clarify exactly what this tool does?
> I am unclear what is meant by "overviews". A tile is not
> an overview and why would they need to be resampled?
> 
> Thanks,
> 
> Ben
> 
> On 03/03/2010 09:25 AM, Nacho wrote:
> > Hi Wolfgang,
> > gvSIG can build tiles with the option Raster Layer/Overviews. You can
> > choose the number of overviews, ratio and resampling method with the
> > preferences dialog. Depending on the format the process will rewrite the
> > image, be careful.
> > 
> > Regards,
> > Nacho
> > 
> > El mar, 02-03-2010 a las 08:31 -0800, Wolfgang Qual escribió:
> >> Hi Luis, Jukka, list,
> >> tiled tiff works well. Only some little modifications for the gdal_translate
> >> command:
> >>
> >> gdal_translate -co "TILED=YES" original.tif tiled.tif
> >>
> >> This creates a new GTiff which is approx 1.5 times bigger than the original.
> >> But gvSIG renders the image very fast. However, creating ecw is not possible
> >> (with my gdal installation).
> >> Thank you very much for your help
> >>
> > 
> > 
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>