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April 2006

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2006.04.04 16:50 "BigTIFF Suggestion", by Larry Michaels
2006.04.04 21:33 "Re: BigTIFF Suggestion", by Chris Cox
2006.04.04 21:56 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.05 01:59 "Re: BigTIFF Suggestion", by Bob Friesenhahn
2006.04.05 02:22 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.06 09:46 "Re: BigTIFF Suggestion", by Gerben Vos
2006.04.06 15:11 "Re: BigTIFF Suggestion", by Bob Friesenhahn
2006.04.14 17:44 "Re: BigTIFF Suggestion", by <melser.anton@gmail.com>
2006.04.14 18:13 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.15 10:18 "Re: BigTIFF Suggestion", by <melser.anton@gmail.com>
2006.04.04 22:09 "Re: BigTIFF Suggestion", by Frank Warmerdam
2006.04.04 22:14 "Re: BigTIFF Suggestion", by Larry Michaels
2006.04.04 22:24 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.04 22:34 "Re: BigTIFF Suggestion", by Larry Michaels
2006.04.04 22:42 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.04 23:07 "Re: BigTIFF Suggestion", by Larry Michaels
2006.04.05 00:17 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.05 02:25 "Re: BigTIFF Suggestion", by Joris Van Damme
2006.04.05 11:12 "Re: BigTIFF Suggestion", by Leonard Rosenthol
2006.04.05 16:13 "Re: BigTIFF Suggestion", by Bill Bither

2006.04.04 16:50 "BigTIFF Suggestion", by Larry Michaels

I would like to propose the addition of a field to the BigTIFF specification, 
perhaps in the header, to specify the offset to the last IFD.  This would make 
the task of appending new images to the end of the BigTIFF file much more 
efficient than it currently is.  Currently, appending an image requires seeking 
to each IFD, starting with the first, reading the tag count value, and then 
seeking to the next IFD offset value until the last IFD is found.  This can be 
quite time-consuming when appending images to files which already contain a
large number of images.  Being able to seek directly to the last IFD would 
radically improve performance in such situations.


Larry Michaels