- 2007.07.11 09:53 "Re: [Tiff] BigTIFF, let the race begin!", by Frederic Delhoume
- 2007.07.11 12:58 "Re: [Tiff] BigTIFF, let the race begin!", by Edward Lam
- 2007.07.11 16:13 "[Tiff] RE: Tiff Digest, Vol 38, Issue 22", by Kemp Watson
- 2007.08.17 14:51 "[Tiff] tiff problems win to mac", by Balint Radics
2007.07.11 09:53 "Re: [Tiff] BigTIFF, let the race begin!", by Frederic Delhoume
Hi,
I have updated my VLIV Windows viewer to allow bigtiff files loading. No changes on my source except for recognizing these files.
It works on the sample files from Aware Systems, but I did not generate myself large (more then 4 Gigabytes) BigTIFF files that I could test in Vliv. It seem to still load standard TIFFs, that is good news ;-)
The viewer is available as a free download on http://vlivviewer.free.fr/vliv.htm
in the download section.
It should handle strips and tiles nicely, only loading what intersects the view area. It only recognizes BigTIFF files that start with 0x49, 0x49, 0x2b, 0x00 only
There should be no real limitation on the file size so 80000x80000 looks small... In fact I have already loaded standard TIFF files with dimensions much larger than that.
Frederic.
----- Original Message ----
Today I used GraphicsMagick in conjunction with the BigTIFF capable
libtiff (still under development) from CVS to create a 9.2GB tiled
TIFF file on an Intel FreeBSD system. Not being satisifed with that,
I then switched over to a SPARC Solaris system and created an 18GB
stripped TIFF, with one row per strip. Both files were read to verify
sane content.While GraphicsMagick can handle huge files (except for under Windows),
I am sure that some other software is better equipped for this task.
I am interested to hear about the largest BigTIFF files (with verified
readability) that people are able to write using their applications.
Let the race begin!
% tiffinfo bigtiff.tiff
TIFF Directory at offset 0x47868c010 (19200000016)
Image Width: 80000 Image Length: 80000
Bits/Sample: 8
Sample Format: unsigned integer
Compression Scheme: None
Photometric Interpretation: RGB color
Samples/Pixel: 3
Rows/Strip: 1
Planar Configuration: single image plane
DocumentName: /home/bfriesen/bigtiff.tiff
Software: GraphicsMagick 1.2 unreleased Q8
http://www.GraphicsMagick.org/
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