2014.01.20 16:03 "[Tiff] R: WRITE BIGTIFF RGB", by

2014.01.20 16:16 "Re: [Tiff] R: WRITE BIGTIFF RGB", by Joris Van Damme

Mary,

> > Where did you get your libtiff?

I use the libtiff from http://bigtiff.org.

That's not official LibTiff. If you need answers specific to that library, you'll likely need to contact the folks that distribute it.

> > Does it work if you use no compression instead of jpeg?

Yes, If I use COMPRESSION_NONE it works, but there’s the same problem: when

I open the output’s image, there is an error message: “invalid or unsupported tif file”

Where does that error message come from? If it's reported by some software package different from the library you're using, it's like it means exactly what it says. BigTIFF support in likely not very widespread at this time.

> > Does it really break only when you reach 4GB file size, meaning it works > > with a BigTIFF smaller than that?

Yes, It works with TIFF smaller 4GB and the output’s image is correct, but if the uncompressed image is over 4GB I can’t open my output image.

I could be mistaking, but I seem to remember that library you're using has a quirky feature to automatically switch to BigTiff output if the file size exceeds 4 gig. So are you sure the file smaller then 4 gig is in fact a BigTIFF file?

Best regards,

Joris Van Damme
AWare Systems
info@awaresystems.be
http://www.awaresystems.be/