[gdal-dev] suggestion for faster overviews building

[Duarte Carreira]

Hi Jukka. Now that you mentioned it I recall seeing that discussion online.

I'll give it a try. It would be more elegant if vrt format supported several overview levels.

Thanks.
Duarte

-----Mensagem original-----
De: Jukka Rahkonen [mailto:jukka.rahkonen at mmmtike.fi] 
Enviada: terça-feira, 4 de Fevereiro de 2014 15:19
Para: gdal-dev at lists.osgeo.org
Assunto: Re: [gdal-dev] suggestion for faster overviews building

Duarte Carreira <DCarreira <at> edia.pt> writes:


>  
> Is there a way to merge de resampled images into an .ovr? Or maybe
reference the resampled images in a vrt and have them used as overviews?

Hi,

Even Rouault helped me when I was experimenting with something like this.
You can catch the discussion from here
http://permalink.gmane.org/gmane.comp.gis.gdal.devel/31829
The zip file is also still available
http://latuviitta.org/documents/GDAL_Scale_dependent_VRT_test.zip

This is more fun than doing by hand what gdaladdo normally does because the overviews are not subsampled but they come from totally different data.

-Jukka Rahkonen-