Update for latest geoarrow

[kylebarron]

I'd love to update h3arrow for the latest geoarrow-rs, and potentially use h3arrow as an (optional) dependency from Lonboard, a Python library for large geospatial vector data visualization.

Some changes:

• As of this week (unreleased) geoarrow-rs does not have an O: OffsetSizeTrait generic on the PolygonArray: Remove "large" arrays and scalars with i64 offsets geoarrow/geoarrow-rs#803. In order to overflow the offsets of an int32, you'd need to have more than 2^32 coordinates in a single contiguous array, which would take up 32GB alone. Removing this generic makes it easier to move faster in geoarrow-rs and took out a ton of complexity.
• On the contrary, I think supporting multiple dimensions in geoarrow-rs is necessary complexity. So arrays now have a const D: usize generic for the physical dimension. So now when you construct arrays you'd have PolygonArray<2>.
• I started to implement a pyo3-geoarrow Rust helper module to make it easier to handle zero-copy data interop from Python, but that's not yet fully standardized.

Let me know if I can help or give pointers to any of this.

[nmandery]

Great. I did not know about lonboard - looks good. Do you want to use the h3arrow rust library as a optional dependency or h3ronpy? I just moved h3arrow into the h3ronpy repo and planned to not push it to crates.io anymore, as there are no other users. In case you need it, I can keep publishing it.

I started migrating to arrow 52 and geoarrow 0.3, but got side-tracked during working on this - so I did not finish it. I will try to push it ahead. Thanks for the migration hints 👍

[kylebarron]

Do you want to use the h3arrow rust library as a optional dependency or h3ronpy?

Sorry I wasn't clear. Ideally I'd use h3ronpy and not make my own Python bindings (lonboard doesn't use Rust itself, only via dependencies, and thus doesn't have a build system in place).