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From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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To: Phil Harvey <phil@owl.phy.queensu.ca>
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Subject: Re: [Tiff] eta for bigtiff support?
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On Mon, 18 Jan 2010, Phil Harvey wrote:

> On 15-Jan-10, at 12:00 PM, tiff-request@lists.maptools.org wrote:
>> What's wrong with "image/tiff" and "TIF"? GIF doesn't have different
>> MIME types and extensions for its different versions.
>
>
> This has been debated before, and probably will be debated
> again, but my opinion is that a new file type is needed.
>
> Technically, according to the TIFF 6 specification, the 0x002a
> in the TIFF header is a file identifier.  So this can not
> be used as a version number because any file with a different
> number is not a TIFF file according to the specification.
>
> This is different than GIF, which defined "87a" as a version number
> in the original specification.

Older GIF readers (such as the gif2tiff that comes with libtiff) are 
not able to read newer version GIF files.

My feeling is that calling BigTIFF a new format will cause more harm 
than good.  Many existing applications will be able to read BigTIFF 
files by simply building with a newer version of libtiff.  Regardless, 
I do agree it is a new format.

Bob
--
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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