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From: Andrey Kiselev <dron@ak4719.spb.edu>
Date: Wed, 6 Feb 2008 14:46:20 +0300
To: tiff@lists.maptools.org
Subject: Re: [Tiff] Why is TIFF/zip not a default option?
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Status: RO

On Wed, Feb 06, 2008 at 12:05:30PM +0100, Anders Sewerin Johansen wrote:
> Can I conclude that most recent libtiff equiped systems (e.g. systems
> deployed or updated during the last five years) will support tiff/zip?

Talking about UNIX/Linux systems the answer should be yes, because zlib
is essential package for any system and if distribution contains libtiff
then it should be built with zlib support. Not so on Windows, AFAIR
default image viewer supplied with some versions of that OS does not
support deflate in TIFFs (as well as some other TIFF features). It can
be fixed quite easy by installing one of the free image viewers available
for Windows, but if you must rely on that particular software it can be a
problem. Also I am agree with Andy's notes on LZW/Deflate
ratio/performance issues. Just do not forget about using predictor
feature when compressing with LZW/Deflate, it often helps to reduce
ration by the small performance impact.

Best regards,
Andrey

-- 
Andrey V. Kiselev
ICQ# 26871517
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