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October 2005
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2005.10.18 17:45 "Re: Change existingTiffTag", by Frank Warmerdam
On 10/18/05, Tobias Gurski wrote: > > I try to change a tiff Tag in a existing tiff file . But I can't find a way > to do this with the libtiff. Is there any way or not! I tried tiffsetField > but it doesn't work. I searched 2 days without any result! Please help. > Thanks Tobias, You might want to look at the tiffset program in libtiff/tools. It just opens the file in "r+" mode, and uses TIFFSetField() to set/reset selected fields. The thing to be aware of about this approach is that a new directory with the updated values gets written at the end of the file, orphaning the disk space used for the previous incarnation of the directory. But if that isn't a problem for you, it should be practical. 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 | Geospatial Programmer for Rent