[gdal-dev] COG - RGBI

Frank Warmerdam warmerdam at pobox.com
Fri May 8 12:14:34 PDT 2020


The big benefit of JPEG compression comes with YCbCr color space which I do
not believe can be mixed with a 4 band RGBI product.  So I'm not sure how
one would do this.  One could certainly put the NIR in a distinct directory
in the GeoTIFF, but not many applications would know how to utilize that,
and it would not appear as just a 4th band from the GDAL view of things.

In theory you could do BAND interleaved JPEG and compress each of the 4
bands separately but I do not think you get a great quality/compression
result from this.

I'm also curious if you were wanting to just do 8bit or 12/16bit?

I would love to have a way of distributing 12/16 bit RGBI data with a good
(gentle) lossy compression and good application compatibility in TIFF.

Best regards,

On Fri, May 8, 2020 at 3:08 PM Travis Kirstine <traviskirstine at gmail.com>

> Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression?
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I set the clouds in motion - turn up   | Frank Warmerdam,
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