Sorry for including this dependency in Calcite. I wasn’t aware of this issue 
with EPSG until we discussed the draft release of Apache Baremaps.

I will make a PR to remove it and I will try to find a work around for future 
releases.

Bertil

> On 23 Nov 2022, at 17:31, Julian Hyde <[email protected]> wrote:
> 
> Bertil has logged https://issues.apache.org/jira/browse/CALCITE-5399 
> describing a licensing issue with the Proj4j library, which we added as a 
> dependency in the last release. Though it describes itself as Apache 
> licensed, it embeds a data set (EPSG) that requires the user to agree to its 
> terms of use.
> 
> Julian

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