AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2015.03.02 01:31 "[Tiff] how can i look at the image or save processing image??", by 이강훈
2015.03.02 02:26 "Re: [Tiff] how can i look at the image or save processing image??", by Bob Friesenhahn
2015.03.09 02:11 "[Tiff] about TIFFReadDirectory", by 이강훈
2015.03.09 02:23 "Re: [Tiff] about TIFFReadDirectory", by Bob Friesenhahn

2015.03.09 02:23 "Re: [Tiff] about TIFFReadDirectory", by Bob Friesenhahn

On Mon, 9 Mar 2015, 이강훈 wrote:

> hi 

i processing the satellite images. that 20076x24056 and 3.6GB

i am used VS2012 and 3.8.2 version

the image used laystack(r,g,b,n channel) and resolutionmerge in erdas

i am trying to copy effort but i am trouble massage

-------------------------------------------------------------------------------------------------- TIFFReadDirectory: warning, semi.tif:unkown field with tag 33550 <0x830e>encountered.

TIFFReadDirectory: warning, semi.tif:unkown field with tag 33922 <0x8482>encountered.

TIFFReadDirectory: warning, semi.tif:unkown field with tag 34735 <0x07af>encountered.

TIFFReadDirectory: warning, semi.tif:unkown field with tag 34737 <0x87b1>encountered.

These are just warnings and may be benign, or might be significant, depending on what they are for. They are for tags that libtiff does not know about by default.

See these links for descriptions of the tags you mentioned (all Geotiff):

http://www.awaresystems.be/imaging/tiff/tifftags/modelpixelscaletag.html

http://www.awaresystems.be/imaging/tiff/tifftags/modeltiepointtag.html

http://www.awaresystems.be/imaging/tiff/tifftags/geokeydirectorytag.html

http://www.awaresystems.be/imaging/tiff/tifftags/geoasciiparamstag.html

The libtiff you are using is very old (from 2007). I am not sure if your libtiff supports it, but modern libtiff provides a way that you can add support for additional tags.

is what i missed?? any help is appreciated!!

I did not test your code but perhaps it will be helpful that often such warnings are not significant to what you are doing.

Bob
--
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/