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Date: Sun, 19 Nov 2006 15:12:53 -0500
From: Frank Warmerdam <warmerdam@pobox.com>
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To: Paul Surgeon <surgpm@cybersmart.co.za>
Subject: Re: [Tiff] tiffinfo large file issue
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Status: RO

Paul Surgeon wrote:
> tiffinfo seems to have problems with large files.
> 
> TIFFReadDirectory: Warning, mosaic.tif: unknown field with tag 33550 (0x830e) 
> encountered.
> TIFFReadDirectory: Warning, mosaic.tif: unknown field with tag 33922 (0x8482) 
> encountered.
> TIFFReadDirectory: Warning, mosaic.tif: unknown field with tag 34735 (0x87af) 
> encountered.
> TIFFReadDirectory: Warning, mosaic.tif: unknown field with tag 34736 (0x87b0) 
> encountered.
> mosaic.tif: Error fetching data for field "BitsPerSample".
> 
> This is with LIBTIFF version 3.7.4 and a 2.8 GiB GeoTIFF (33021 x 28701).
> gdal and ossim have no problems with the file.
> 
> I've resorted to using gdalinfo instead but thought someone may want to know 
> about the problem.

Paul,

It depends on how libtiff is built whether it will support files larger
than 2GB.  As Bob mentions 3.7.4 is old, but I'm sure even 3.7.4 can
support large files if built properly.  It might be appropriate to
contact whoever built the binaries about updating, and looking into how
to build with large file support.

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    | President OSGeo, http://osgeo.org

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