Changes in version 1.1.11                        

  - Fix deprecated Abseil usage and Rcpp include order #300 #297 #299

                 Changes in version 1.1.9 (2025-05-23)                  

  - Implement serialization support for s2_geography vectors. This not
    only allows data containing s2 geography to be safely saved and
    restored across R sessions, but also enables using s2 in parallel
    algorithms such as mclapply() (#283)
  - Fix code to help gcc-ubsan understand the region coverer (#275)
  - Inspect S2_FORCE_BUNDLED_ABSEIL in conifigure: if non-empty, any
    system install of Abseil is ignored (e.g., if using a non-standard
    compiler on a system where system Abseil is available via
    pkg-config) (#275)
  - Disable optimization in compact_array.h that confused compilers when
    compiling with -Wpedantic (#275).
  - Add cmake to SystemReqirements. Even though this is technically
    optional (system Abseil can be used), adding to requirements helps
    some installers automatically install the dependency (#277).

                 Changes in version 1.1.8 (2025-05-12)                  

  - s2_buffer_cells() recycles max_dist and min_level arguments,
    allowing to specify these by feature (#264 and
    https://github.com/r-spatial/sf/issues/2488).
  - The internal version of s2geometry is now 0.11.1 (#257, #263).
  - The Abseil dependency is resolved using pkg-config where possible.
    Where this is not possible, a vendored version of Abseil will be
    built using CMake (#258).

                 Changes in version 1.1.7 (2024-07-17)                  

                 Changes in version 1.1.6 (2023-12-19)                  

  - Fix CRAN warning (#254).

                 Changes in version 1.1.5 (2023-12-10)                  

  - fix compiler problem on Alpine 3.19.0 (#251)

                 Changes in version 1.1.4 (2023-05-17)                  

  - Updated more tests to pass on a forthcoming waldo package update
    (#237).

                 Changes in version 1.1.3 (2023-04-27)                  

  - Made a test less strict to pass tests on Alpine Linux (#218, #220).
  - Updated tests to pass on forthcoming waldo package update (@hadley,
    #226).
  - Updated vendored file modifications to suppress a multi-line comment
    warning on gcc (#214, #227).

                 Changes in version 1.1.2 (2023-01-12)                  

  - Fixed test for as.data.frame() for s2_cell() to comply with new wk
    version and the latest release of R (#207).
  - Fix unary union of an empty multipolygon (#208).
  - Added #include <cstdint> to an Abseil header to fix compilation with
    gcc13 (#209, #210).
  - Update internal Abseil to 20220623.1 LTS (#213).

                 Changes in version 1.1.1 (2022-11-17)                  

  - Fix new CRAN check warnings (#202, #203).

                 Changes in version 1.1.0 (2022-07-18)                  

  - Fix for s2 build on Windows with R <= 3.6.x (#142)
  - Fix for s2 build on MacOS with multiple openssl versions (#142,
    #145, #146)
  - Fix for s2 build on 32-bit openssl (#143, #147)
  - Added s2_convex_hull() and s2_convex_hull_agg() (@spiry34, #150,
    #151, #163).
  - Added max_distance argument to s2_closest_edges(), making
    distance-constrained k-nearest neighbours possible (#125, #156,
    #162).
  - Added a spherical s2_point_on_surface() implementation for polygons
    (@kylebutts, #152, #161)
  - Added a s2_cell_union() vector class to represent cell coverings and
    operators to generate them from an s2 geography vector (e.g.,
    s2_covering_cell_ids()). Cell unions are useful as compact
    representations of spherical geometry and can be used like a
    bounding box to determine a possible intersection with one or more
    geographies (#85, #94, #164).
  - Refactored the simple features compatability layer into a standalone
    code base for potential future use in a Python adaptation (#165).
  - Migrate input and output to non-deprecated wk package handlers and
    writers (#101, #165, #168).
  - Make s2_union_agg() more efficient using a recursive merge strategy
    (#103, #165).
  - Fix package build on Raspberry Pi (#169, #171).
  - Fix warning on clang14 when compiling with -O0 (#167, #172).
  - Added s2_prepared_dwithin() and fixed s2_dwithin_matrix() such that
    it efficiently uses the index (#157, #174).
  - Updated s2_lnglat() and s2_point() to use wk::xy() (a record-style
    vctr) to represent point coordinates. This is much faster than the
    previous representation which relied on list() of external pointers
    (#181, #159).
  - Added arguments planar and tessellate_tol_m to s2_as_text(),
    s2_as_binary(). Use planar = TRUE and set tessellate_tol_m to the
    maximum error for your use-case to automatically subdivide edges to
    preserve or "straight" lines in Plate carree projection on import
    (#182).
  - Added arguments planar and tessellate_tol_m to s2_geog_from_text(),
    and s2_geog_from_wkb(). Use planar = TRUE and set tessellate_tol_m
    to the maximum error for your use-case to automatically subdivide
    edges to ensure or "straight" lines in Plate carree projection on
    export (#182).

                 Changes in version 1.0.7 (2021-09-28)                  

  - Update the internal copy of s2geometry to use updated Abseil, fixing
    a compiler warning on gcc-11 (#79, #134).

                 Changes in version 1.0.6 (2021-06-17)                  

  - Added support for STRICT_R_HEADERS (@eddelbuettel, #118).
  - Fixed a bug where the result of s2_centroid_agg() did not behave
    like a normal point in distance calculations (#119, #121).
  - Fixed a Windows UCRT check failure and updated openssl linking
    (@jeroen, #122).

                 Changes in version 1.0.5 (2021-06-01)                  

  - Added s2_projection_filter() and s2_unprojection_filter() to expose
    the S2 edge tessellator, which can be used to make Cartesian or
    great circle assumptions of line segments explicit by adding points
    where necessary (#115).
  - Added an s2_cell() vector class to expose a subset of the S2
    indexing system to R users (#85, #114).
  - Added s2_closest_edges() to make k-nearest neighbours calculation
    possible on the sphere (#111, #112).
  - Added s2_interpolate(), s2_interpolate_normalized(), s2_project(),
    and s2_project_normalized() to provide linear referencing support on
    the sphere (#96, #110).
  - Fixed import of empty points from WKB (#109).
  - Added argument dimensions to s2_options() to constrain the output
    dimensions of a boolean or rebuild operation (#105, #104, #110).
  - Added s2_is_valid() and s2_is_valid_detail() to help find invalid
    spherical geometries when importing data into S2 (#100).
  - Improved error messages when importing and processing data such that
    errors can be debugged more readily (#100, #98).
  - The unary version of s2_union() can now handle MULTIPOLYGON
    geometries with overlapping rings in addition to other invalid
    polygons. s2_union() can now sanitize almost any input to be valid
    spherical geometry with minimal modification (#100, #99).
  - Renamed the existing implementation of s2_union_agg() to
    s2_coverage_union_agg() to make clear that the function only works
    when the individual geometries do not have overlapping interiors.
    s2_union_agg() was replaced with a true aggregate union that can
    handle unions of most geometries (#100, #97).
  - Added s2_rebuild_agg() to match s2_union_agg(). Like s2_rebuild(),
    s2_rebuild_agg() collects the edges in the input and builds them
    into a feature, optionally snapping or simplifying vertices in the
    process (#100).

                 Changes in version 1.0.4 (2021-01-05)                  

  - Fixed errors that resulted from compilation on clang 12.2 (#88,
    #89).

                 Changes in version 1.0.3 (2020-10-14)                  

  - Fixed CRAN check errors (#80).

                 Changes in version 1.0.2 (2020-08-03)                  

  - Fixed CRAN check errors (#71, #75, #72).

                 Changes in version 1.0.1 (2020-07-13)                  

  - Added layer creation options to s2_options(), which now uses strings
    rather than numeric codes to specify boolean operation options,
    geography construction options, and builder options (#70).
  - Added s2_rebuild() and s2_simplify(), which wrap the S2 C++
    S2Builder class to provide simplification and fixing of invalid
    geographies (#70).
  - The s2 package now builds and passes the CMD check on Solaris (#66,
    #67).
  - Renamed s2_latlng() to s2_lnglat() to keep axis order consistent
    throughout the package (#69).
  - Added s2_bounds_cap() and s2_bounds_rect() to compute bounding areas
    using geographic coordinates (@edzer, #63).
  - s2_*_matrix() predicates now efficiently use indexing to compute the
    results of many predicate comparisons (#61).

                 Changes in version 1.0.0 (2020-06-27)                  

This version is a complete rewrite of the former s2 CRAN package,
entirely backwards incompatible with previous versions.