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From: "Joris" <joris.at.lebbeke@skynet.be>
To: "Andrey Kiselev" <dron@ak4719.spb.edu>, <tiff@lists.maptools.org>
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Subject: Re: [Tiff] 16-Bit-Per-Channel Lossless Compression
Date: Thu, 5 Jul 2007 15:45:47 +0200
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Status:   

Andrey,

Andrey Kiselev wrote:
> $ gdal_translate -co "COMPRESS=ZIP" -co "PREDICTOR=2" -co "TILED=YES"
> -co "BLOCKXSIZE=256" -co "INTERLEAVE=BAND" IMG_2948.Flowers1.tif
> IMG_2948.Flowers1-zip2-tiled-sep.tif

As I don't speak gdalese, what size do tiles have in your test? It's my 
opinion ideally efficient tiles over a broad range of compression modes, 
that fit workflow on today's machines best, are in the order of about 1 to 3 
megabyte, not the legacy 8 kilobyte (uncompressed, of course). I believe 
that for some compression modes, tile size does have a considerable impact 
on efficienty.


Best regards,

Joris Van Damme
info@awaresystems.be
http://www.awaresystems.be/
Download your free TIFF tag viewer for windows here:
http://www.awaresystems.be/imaging/tiff/astifftagviewer.html
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