[4.5.0a2] - 2026-02-27

• cells_to_h3shape/cells_to_geo now handle all valid cell sets, including
  sets that would produce global polygons crossing the antimeridian, poles, or are larger than a hemisphere
  • Duplicate cells now raise H3DuplicateInputError
  • Mixed-resolution cells now raise H3ResMismatchError
  • Internal: switch from linked-list to array-based C API for cells-to-polygon conversion

[4.5.0a1] - 2026-02-25

• Update h3lib with draft v4.5 changes
• Drop Python 3.8 and 3.9 (EOL); minimum is now Python 3.10
• Document Python 3.14 support
• Migrate build tooling from Makefile/pip to justfile/uv, including CI

[4.4.2] - 2026-01-29

• Check for error from cellsToLinkedMultiPolygon (#477)

[4.4.1] - 2025-12-15

• Fix PyPI publishing issue (#474)

[4.4.0] - 2025-12-12 (never published on PyPI)

• Update h3lib to v4.4.1. (#470)
  • Add new error codes:
    • H3IndexInvalidError
    • H3BaseCellDomainError
    • H3DigitDomainError
    • H3DeletedDigitError
  • Add new functions:
    • is_valid_index
    • get_index_digit
    • construct_cell
    • deconstruct_cell

[4.3.1] - 2025-08-10

• Build wheels for Windows on ARM64 (#463)

[4.3.0] - 2025-06-17

• Update h3lib to v4.3.0. (#461)
  • Uses gridRing (uber/h3#1016) instead of Cython fallback logic.

[4.2.2] - 2025-03-10

• Update h3lib to v4.2.1. (#450)

[4.2.1] - 2025-01-31

• Correct pyproject.toml links for PyPI (#441)
• Update coverage badge (#443)

[4.2.0] - 2025-01-26

• Update h3lib to v4.2.0. (#432)
• Add h3shape_to_cells_experimental (#436)
  • Add polygon_to_cells_experimental alias

[4.1.2] - 2024-10-26

• Build Python 3.13 wheels (#425)

[4.1.1] - 2024-10-13

• Make sure docs and PyPI page are up-to-date.

[4.1.0] - 2024-10-13

• Final v4.1 release inculdes all v4.x changes below.

[4.1.0b3] - 2024-10-05

• Allow for str subtypes, like numpy.str_ (#408)

[4.1.0b2] - 2024-09-27

• Add cell_to_child_pos, child_pos_to_cell, cell_to_children_size (#405)

[4.1.0b1] - 2024-09-26

• Bump h3lib to v4.1.0 (#402)
• Add polygon_to_cells alias (#399)

[4.0.0b7] - 2024-09-04

• Use pyproject.toml and scikit-build-core (#378)

[4.0.0b6] - 2024-09-03

• Added bindings for cellToVertex, cellToVertexes, vertexToLatLng, and isValidVertex (#388)

[4.0.0b5] - 2024-05-19

• Rename H3Poly and H3MultiPoly to LatLngPoly and LatLngMultiPoly (#364)
• Add ability to convert from __geo_interface__ objects with Z-coordinate (#371)

[4.0.0b4] - 2024-04-14

No changes, just testing: #360

[4.0.0b3] - 2024-03-11

• Change supported Python versions to 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 (#324, #325, #347, #348)
• New h3.Polygon()/GeoJSON interface (#301)
• Use functions instead of methods for the interface functions (#334)
• Use list instead of set for unordered Python outputs (#339)

[4.0.0b2] - 2022-11-23

• Build Python 3.11 wheels (#297)

[4.0.0b1] - 2022-08-23

Beta release; feedback welcome!

• Move to v4.0 of the core C library (#250)
  • Function name changes: https://github.com/uber/h3/blob/master/dev-docs/RFCs/v4.0.0/names_for_concepts_types_functions.md
  • New error system
  • New interfaces for polygon_to_cells and cells_to_polygons involving a new h3.Polygon class
• Expose the Cython API (#234)
  • Note: The Cython API is not yet stable, and should only be used for experimentation

[4.1.0b3] - 2024-10-05

• Allow for str subtypes, like numpy.str_ (#408)

[4.1.0b2] - 2024-09-27

• Add cell_to_child_pos, child_pos_to_cell, cell_to_children_size (#405)

[4.1.0b1] - 2024-09-26

• Bump h3lib to v4.1.0 (#402)
• Add polygon_to_cells alias (#399)

[4.0.0b7] - 2024-09-04

• Use pyproject.toml and scikit-build-core (#378)

[4.0.0b6] - 2024-09-03

• Added bindings for cellToVertex, cellToVertexes, vertexToLatLng, and isValidVertex (#323)

[4.0.0b5] - 2024-05-19

• Rename H3Poly and H3MultiPoly to LatLngPoly and LatLngMultiPoly (#364)
• Add ability to convert from __geo_interface__ objects with Z-coordinate (#371)

[4.0.0b4] - 2024-04-14

No changes, just testing: #360

[4.0.0b3] - 2024-03-11

• Change supported Python versions to 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 (#324, #325, #347, #348)
• New h3.Polygon()/GeoJSON interface (#301)
• Use functions instead of methods for the interface functions (#334)
• Use list instead of set for unordered Python outputs (#339)

[4.0.0b2] - 2022-11-23

• Build Python 3.11 wheels (#297)

[4.0.0b1] - 2022-08-23

Beta release; feedback welcome!

• Move to v4.0 of the core C library (#250)
  • Function name changes
  • New error system
  • New interfaces for polygon_to_cells and cells_to_polygons involving a new h3.Polygon class
• Expose the Cython API (#234)
  • Note: The Cython API is not yet stable, and should only be used for experimentation

[3.7.7] - 2024-03-09

• Build Python 3.12 wheels (#344)

[3.7.6] - 2022-11-23

• Build Python 3.11 wheels (#299)

[3.7.4] - 2022-04-14

• Website and API documentation; along with docstring cleanup.
• Add support for linters and IDE tooling (#213)
• Remove Py 3.5 wheel for Windows (#214)
• Py 3.10 wheels and on more architectures (#220, #221, #223, #225)
• Greatly reduce sdist size (#227, #229)

[3.7.3] - 2021-06-12

• Wheels for Linux Aarch64 (#189)

[3.7.2] - 2021-03-01

• Add vectorized h3_to_parent and h3_get_resolution (#166)

• fix for #169: h3_distance error reporting (#175)
• build Python 3.9 wheel for Mac (#175)
• bump h3lib version to v3.7.1 (#175)

Add functions (#171)

- cell_area
- exact_edge_length
- point_dist

• Add requirements.in for pip-compile usage (#157)
• Update h3-c to v3.6.4 (#157)
• Add functions:
  • experimental_local_ij_to_h3 (#155)
  • experimental_h3_to_local_ij (#155)
  • h3.unstable.vect.cell_haversine (#147)
  • h3.unstable.vect.geo_to_h3 (#147)
  • Prototype v4 names under h3.unstable.v4 (#146)

Add functions: - get_res0_indexes - h3_to_center_child - h3_get_faces

• Improve error reporting on hex2int (https://github.com/uber/h3-py/pull/127)
• Build Linux wheels for Python 2.7

• Switch to Cython wrapper implementation
• Pre-built wheels on PyPI for Linux/Mac/Windows
• Provide multiple APIs:
  • h3.api.basic_str
  • h3.api.basic_int
  • h3.api.numpy_int
  • h3.api.memview_int

This is just a test release for testing the github action release workflows.

• Removed null values in k_ring_distances.
• Support on Windows Platform
• Fixed some install problems

• Added h3_line support.

• Added h3_distance function.
• Updated the core library to v3.1.0.

Added

• First public release.