[gdal-dev] Upcoming Cloud Optimized Geotiff (COG) related enhancements

[Even Rouault]

> About point 1, 2, 3 I have mixed feeling because to me it seems that we will
> introduce a new driver to replace the combination of gdal commands
> (disclaimer as one of the creator of rio-cogeo I may not be fully objective
> here).

Yes, the COG driver will clearly have overlap with rio-cogeo. I can imagine 
that there are use cases where having it available directly as a GDAL driver 
might be more convenient.

> Why this is specific to JPEG compression, what about other compressed format
> with internal mask ?

There's nothing specific indeed. This is just the main use case where internal 
mask is really needed (other compression types can generally handle alpha as a 
4th regular band), but yes we can generalize this optimization to any 
compression type.

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