On Mon, 14 Jun 2021, matt.wil...@yukon.ca wrote:
Your initial test.tif file needs to be a bigtiff, i.e. have been
created with -co "BIGTIFF=YES". you can then drop the bigtiff
config arguments of your gdaladdo call.
Ahh, thanks Thomas, that indeed is the problem.
Unfortunately for me it means in this case I'm stuck,
as the original is jpeg-tiff and I don't want to pay the penalty
of another decompress-recompress cycle to change to big tiff.
However at least I know what's going on now.
The description at http://bigtiff.org strongly suggests that
you can convert a tiff to a bigtiff without decompressing.
I do not have a pointer to code or an application (beyond
the BigTIFF version of libtiff) but some of the people named
as involved with the design are on this list.
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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