2004.01.23 22:14 "RE: [Tiff] Reading Custom Tags", by Pushkar Pradhan
If you are reading/writing lot of geotiffs, then you may want to use GDAL (http://www.remotesensing.org/gdal).
This library reads geotiffs and many other remote sensing format images.
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> Subject: [Tiff] Reading Custom Tags
I am having sime trouble reading custom tags from a TIFF file. The tags are two GeoTIFF tags, (33550 and 33922), which hold 3 doubles and 6 doubles respectively. I have found very little documentation on custom tags online, apart from the 3.6.0 spec notes page, which would seem to indicate you read them more or less like standard tags like TIFFTAG_IMAGEWIDTH.
So, I use something like:
I am using version 3.6.0 of the library. Any help is appreciated!