I have never heard of this library before, which is surprising, because I've been looking hard for such a hexagonal privacy-fencing system for a long time!

I can't find anything that explains how the partitioning in geohex works, but the Uber system makes it clear that they are using Dr. Sahr's partitioning scheme: https://github.com/uber/h3/blob/master/docs/doxyfiles/h3inde...