Feature/h3ronpy

[zacharyDez]

What I Changed

1. Refactored generate_h3_geometries function:

   • Added support for handling H3 hexagon IDs in uint64 format and converting them to geometries (either polygons or points).
   • Fixed the logic to correctly handle H3 ID to geometry conversion, using cells_to_wkb_polygons for polygons and cells_to_wkb_points for centroids.
   • Improved error handling by raising proper exceptions if invalid geometry types or pyarrow Scalar types are encountered.

2. Adjusted aggregate and summaries methods in StatsTable:

   • Integrated cells_to_string to convert H3 IDs before database operations.
   • Added a ValueError check if the query returns no rows (to catch invalid fields).
   • Refined SQL query generation to ensure it properly interacts with H3 IDs stored as hexagons.

3. Unit Tests:

   • Updated the test cases in test_h3_utils.py and test_module.py to reflect the changes in how geometries are generated.
   • Added assertions for error handling (e.g., invalid field names in aggregate should now raise a ValueError).
   • Updated tests to include both polygon and point geometry handling.

4. Error Fixes:

   • Resolved the TypeError: Expected pyarrow Buffer, but got LargeBinaryScalar by ensuring proper conversion from pyarrow Scalar types.
   • Fixed SQL query results processing to handle and print row outputs when appropriate.

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How to Test It

1. Unit Tests:

   • Run pytest on the following test files:
     • tests/test_module.py
     • tests/test_h3_utils.py
     • tests/test_api.py
   • These tests will cover:
     • H3 ID generation
     • Geometry conversion for both polygons and points
     • Database interactions via the StatsTable methods
     • Error handling for invalid field names and geometries

2. Notebooks:

   • Test the updated geometry generation functionality by running the relevant notebooks, such as notebooks/user-docs/space2stats_api_bug.ipynb, which shows how point geometries aren't being generated properly.

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Other Notes

• notebooks/user-docs/space2stats_api_bug.ipynb shows an example where point geometries are not being generated correctly. Further investigation is needed into the issue with point geometries and H3 ID conversion.

[zacharyDez]

@kylebarron; some weird behavior with points I might need help with:

[Gabe-Levin]

@zacharyDez I ran the test files specified above and they are all passing. However, I couldn't find this notebook: notebooks/user-docs/space2stats_api_bug.ipynb

Has it been removed on purpose, is it still relevant?

[zacharyDez]

Yes! It's been fixed in the new release of h3ronpy, so I removed the notebook.