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From: Frank Warmerdam <warmerdam@pobox.com>
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To: Lynn Quam <quam@ai.sri.com>
Cc: tiff@remotesensing.org, Chris Connolly <connolly@ai.sri.com>,
   Aaron Heller <heller@ai.sri.com>
Subject: Re: [Tiff] Large TIFF files
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Date: Wed, 14 Apr 2004 21:57:55 -0400
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Lynn Quam wrote:
> What is the status of very large TIFF files.
> 
> By very large I mean larger than 2^31 or 2^32 bytes.
> 
> Is there any plan to support the POSIX off_t file offsets?

Lynn,

Files up to 4GB (2^32 bytes) work fine depending on how things are built.
It should work well by default on modern Win32, Linux and Solaris systems
for instance.  Offsets are managed as unsigned 32 bit integers.

There is relatively little point in any further changes unless a way of
representing offsets of greater than 2^32 is added to the TIFF format.  There
have been various discussions, but no concrete effortto move on the >4GB
issue.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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