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Message-id: <fc.0064b57b00dda8233b9aca005867382f.dda83c@ecrm.com>
Subject: Re: [Tiff] 64 bit offsets for large file support
To: warmerdam@pobox.com
Cc: dburken@imagelinks.com, tiff@remotesensing.org
From: "Dan Smith" <d_smith@ecrm.com>
References: <40055BBF.2030705@imagelinks.com>
 <400562C3.50600@pobox.com>
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Date: Wed, 14 Jan 2004 12:11:50 -0500
X-UIDL: 708e438305bf40a596c1989c9f5a50ac
Status: U

warmerdam@pobox.com writes:
>David Burken wrote:
>> Frank, all:
>> 
>> Just wondering if there are any plans to move to using 64 bit offsets 
>> for large file support greater than four gig?
>
>David,
>
>There has been occational discussion on the issue, but it is hard to see how
>it could be done without impacting backward compatbility.  That is, 64bit
>TIFF would essentially be a new format that traditional TIFF readers wouldn't
>be able to touch.
>
>The short answer is that there is no current plan to implement support for
>files larger than 4GB.
>
Wasn't there a suggestion that the TIFF/IT format could be used, as it
allow tiling of multiple TIFF files? I'm not very familiar either with TIFF/IT
or tifflib. Presumably this would NOT be a quick fix, as TIFFLIB doesn't
handle TIFF/IT and neither do most existing TIFF-based applications.

Is TIFF/IT still alive? I don't hear much about it lately.


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