Version 1.3.1

• Updated to h3-js 4.1.0
• New functions cell_to_childpos(), childpos_to_cell() and cell_to_children_size(). See this Observable notebook for use cases.

Version 1.3.0

• Updated to h3-js 4.0.1. Note that v4+ has extensive changes to the underlying API. Some functions in this package have been renamed for consistency:
  • point_to_h3() –> point_to_cell()
  • h3_to_point() –> cell_to_point()
  • h3_to_polygon() –> cell_to_polygon()
  • h3_to_line() –> cell_to_line()
  • get_kring() –> get_disk()
  • get_kring_list() –> get_disk_list()
  • polyfill() –> polygon_to_cells()
  • set_to_multipolygon() –> cells_to_multipolygon()
  • res_count() –> num_cells()
• New functions is_valid_vertex(), get_cell_vertex(), get_cell_vertexes(), and vertex_to_point() are available for interacting with H3 in vertex mode.
• New functions cell_to_splitlong() and splitlong_to_cell() are available for converting between 64-bit string addresses and 32-bit integer pairs.
• New functions degs_to_rads() and rads_to_degs() available for unit conversion.

Version 1.2.3 [CRAN]

• Updated V8 version requirement to ensure consistent build across platforms

Version 1.2.2 [CRAN]

• Updated to h3-js 3.7.2

Version 1.2.1

• Updated to h3-js 3.7.1

Version 1.2.0

• Updated to h3-js 3.7.0
• Added functions cell_area, edge_length, get_dist, and get_res0.
• Revised internal function prep_for_pt2h3

Version 1.1.3

• Updated to h3-js 3.6.4

Version 1.1.2

• Updated to h3-js 3.6.3 - polyfill algo was rolled back due to known issues
• Move to Github Actions for CI workflow
• Remove unneeded lwgeom dependency
• Bugfix for accessing h3_info_table when library not loaded explicitly

Version 1.1.1

• Updated to h3-js 3.6.2 - expect improvements to polyfill() behaviour

Version 1.1

• Updated to h3-js 3.6.1
• Added get_centerchild(), which will return the central child of a hexagon at a given resolution.
• Added get_pentagons(), which will return the twelve pentagon indexes at a given resolution.

Version 1.0

• Updated to h3-js 3.5.0, now using official browser bundle
• Added get_faces(), which returns the icosahedron face(s) for a given H3 address.

Version 0.9

• Updated to h3-js 3.4.2
  
• Replaced custom function min_path() with official version grid_path(), which wraps h3Line to find a path between two addresses.
• Added custom function h3_to_line(), which converts a vector of H3 addresses to sfc_LINESTRING.

Version 0.8

• Updated to h3-js 3.3.0 and babel-polyfill 6.26.0

Version 0.7

• Removed nearest_neighbour(), its fundamentally flawed.
• Simplified output of get_local_ij() to a matrix when simple = TRUE
• Improved outputs from h3_to_point()
• Efficiency improvements to h3_to_point() and polyfill()
• h3_to_point(), h3_to_polygon(), and polyfill() now take a wider range of input objects.

Version 0.6

• Update core library to v 3.2.0
• Add get_local_ij() and get_local_h3(), wrapping the experimental local coordinate system functions h3.experimentalH3ToLocalIj and h3.experimentalLocalIjToH3 respectively.

Version 0.5.1

• Added custom function min_path() to find a minimum-steps path between two H3 addresses of the same resolution.
• Added custom function nearest_neighbour() to find the nearest neighbour for a given set of points. Use with caution, read the notes.

Version 0.5.0

• change to v8 session handling (speed enhancement)

Version 0.4.5

• update core library to v 3.1.1

Version 0.4.4

• bugfix for polyfill(). Where input sf object only has a geometry column, a column called ‘ID_H3’ containing a sequential ID field is now added before sending the geometry to the V8 session.

Version 0.4.3

• Update h3-js to release 3.1.0 - https://github.com/uber/h3-js/releases/tag/v3.1.0
• Add grid_distance(), which returns the number of ‘steps’ required to get from one H3 address to another (within the same resolution).

Version 0.4.2

• Update h3-js to release 3.0.2 - https://github.com/uber/h3-js/releases/tag/v3.0.2

Version 0.4.1

• Warnings converted to messages
• Multipolygon support for h3_polyfill(), plus a message when output resolution is way smaller than input extent.

Version 0.4.0

• Naming things is hard, but its vignette time so, y’know, now or never. Function names are shorter now and make more sense.
• Added another info utility res_cendist() for getting the average distance between the center of each region represented by a H3 address at a given resolution.
• Vignette covering core functionality added.

Version 0.3.1

• Reworked to_point() to return an sfc_POINT object, or an sf point data frame where simple = FALSE.
• Improved outputs of to_polygon() to have a similar structure to h3_to_geo().

Version 0.3.0

• Reworked point_to_h3() to take in an sf point object and return the same when simple = FALSE, resulting in a new dependency on tidyr. On the upside, one can now request addresses for multiple resolutions at multiple points, if one wishes to test the limits of one’s system.

Version 0.2.3

• Added public informational utilities res_area(), res_edgelen(), and res_count()
• Added data table of h3 address info for fast retrieval of information using the above functions
• Fixed resolution validation bug, level 0 is now allowed

Version 0.2.2

• All unidirectional algorithms added: are_neighbours(), get_udedge(), is_valid_edge(), get_udorigin(), get_uddest(), get_udends(), get_udedges(), and udedge_to_line().

Version 0.2.1

• polyfill() and set_to_multipolygon() added; new dependencies on sfand geojsonsf have resulted.
• to_polygon() now returns an object with sf geometry.
• compact() and uncompact() added, all public core algorithms now available.

Version 0.1.3

• Simplified default output behaviour
• get_parent(), get_children(), get_kring(), get_kring_list(), and get_ring() added.

Version 0.1.2

• Added remaining core functions is_valid(), is_pentagon(), is_rc3(), get_base_cell(), get_res(), and to_polygon().
• unit tests on all core functions.

Version 0.1.1

• to_point() added.
• point_to_h3() bugfix. A pox on devs who think y,x is ok.
• NEWS and README added.

Version 0.1.0

• point_to_h3() - first function implemented.