[gdal-dev] Efficient access to large multiband files

Even Rouault even.rouault at mines-paris.org
Sat Mar 9 06:06:29 PST 2013

Le samedi 09 mars 2013 14:54:31, Jose Gomez-Dans a écrit :
> Hi,
> I usually process large multiband datasets (typically 2000*2000*1000 in x,y
> and no. Bands ). I've been using VRT for this but sometimes that is too
> much for our NFS disk setup and timeouts looking up the individual files
> that make up the VRT break my programs.
> So I'm thinking of converting to a real format. My question is what should
> I choose given that I'll use spatial subsets containing contiguous bands
> (say 256*256*300)? Band interleaving, pixel interleaving? Also I wouldn't
> mind a compressed format. Will BigTIFF with a few extra config options be
> enough?

You can try a pixel-interleaved tiled BigTIFF indeed. So use -co TILED=YES 
when creating it. Pixel interleaving is the default . For compression, you can 
for example try -co COMPRESS=DEFLATE .

> Thanks!
> Jose

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