[gdal-dev] zarr driver PR

[Even Rouault]

Hi all,

for those who have monitored the PR tracker lately, you may have noticed 
that I've been working in https://github.com/OSGeo/gdal/pull/3896 for an 
implementation of a Zarr driver. This is now feature complete and in a 
CI ready state. It follows a different approach than the one proposed in 
PR #3411 for the reasons I underlined in 
https://github.com/OSGeo/gdal/pull/3411#issuecomment-831259626

I've also filled the RFC template in 
https://github.com/OSGeo/gdal/pull/3896#issuecomment-872398856

Even


Le 01/02/2021 à 16:45, Sean Gillies a écrit :
> Hi all,
>
> Also deep in our recent long thread about removing drivers from GDAL 
> is mention of a new PR for a "zarr" driver.
>
> https://github.com/OSGeo/gdal/pull/3411 
> <https://github.com/OSGeo/gdal/pull/3411>
>
> I'd like to see more discussion of the scope of this work and plans 
> for future development and support before a zarr driver is added to GDAL.
>
> Is the zarr driver not going to support version 2 of the zarr spec? I 
> that v2 would be difficult to implement as a GDAL driver as it is 
> extremely flexible and extensible. For example, I've written custom 
> compressor and storage for use in a project at work and can't imagine 
> how a driver written in C++ would understand it.
>
> Is the zarr driver based on 
> https://zarr-specs.readthedocs.io/en/core-protocol-v3.0-dev/protocol/core/v3.0.html 
> <https://zarr-specs.readthedocs.io/en/core-protocol-v3.0-dev/protocol/core/v3.0.html>? 
> That work seems not yet finished. Is it premature to add a driver to 
> GDAL for a format that isn't yet specified and may yet be changed? Or 
> should we expect only minor changes at this point?
>
> -- 
> Sean Gillies
>
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