That works, thank you !<br><br>-- oyvind<br><br><div class="gmail_quote">On Mon, Apr 2, 2012 at 3:57 PM, Saâd HESSANE <span dir="ltr"><<a href="mailto:saad.hessane@gmail.com">saad.hessane@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">---------- Forwarded message ----------<br>
From: Saâd HESSANE <<a href="mailto:saad.hessane@gmail.com">saad.hessane@gmail.com</a>><br>
Date: Mon, 2 Apr 2012 15:56:27 +0200<br>
Subject: Re: [gdal-dev] Most optimal way of using tiles ?<br>
To: Oyvind Idland <<a href="mailto:oyvind.idland@gmail.com">oyvind.idland@gmail.com</a>><br>
<br>
Hy,<br>
<br>
you can use "gdaladdo --config COMPRESS_OVERVIEW [DEFLATE | JPEG]" to<br>
create compressed overview.<br>
And then you can use gdalbuildvrt or gdaltindex to build an index of the files.<br>
<br>
2012/4/2, Oyvind Idland <<a href="mailto:oyvind.idland@gmail.com">oyvind.idland@gmail.com</a>>:<br>
> Hello,<br>
><br>
> I got a huge dataset consisting of about 100 uncompressed TIFF's, each with<br>
> size 12599 X 9449 pixels with RGB bands.<br>
> Note, that the TIFF's are not georef'ed, instead there are .tfw's following<br>
> each file. Also, since they are about 350 MB each,<br>
> I guess converting them to a compressed format could speed things up (I/O).<br>
><br>
> The "normal" approach would probably be to make a VRT dataset, and build<br>
> overviews. However, building a an<br>
> overview based on the entire VRT index seems a bit heavy in this case.<br>
><br>
> Is it possible in some way to create compressed overviews (using gdaladdo)<br>
> for each file, and<br>
> then build a VRT based on these ? Will the VRT dataset utilize the<br>
> generated overviews ?<br>
><br>
><br>
> - oyvind<br>
><br>
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</blockquote></div><br>