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Message-ID: <7CBAE56605D7D511967100105ACAB8675568DD@zedi.ziimaging.com>
From: "Grissom, Ed" <egrissom@ziimaging.com>
To: tiff@olympiakos.com
Subject: RE: Largest file size in TIFF
Date: Thu, 28 Mar 2002 09:05:12 -0600
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In a previous message, Neil asked :
> I have what is should be a simple question. 
> What is the largest possible TIFF file size? 

Just off the top of my head....

* For tiled files, one tile size minus one byte over 4GB. (i.e. last tile
index is 0xffffffff )

* For striped files with multiple strips, one strip size minus one byte over
4GB. (i.e. last strip index is 0xffffffff )

* For a single strip file, the limit seems to be 4GB * 4GB * nbands *
bytesperband.  Since nbands _could_ be 4Gig, and bytes per band _could_ be
4G, The largest possible files would be 4GB**4 .

* If you wanted the answer in terms of xsize and ysize, then it is 4Gig
pixels per line, with 4Gig lines.  With compression, this file could be well
under 4GB if the image was particularly uninteresting. 

Obviously, these last two cases are unreasonable, but you did ask for the
largest _possible_ size.  

-- 
ed grissom 
egrissom@ziimaging.com 


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