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s2 1.1.5

• fix compiler problem on Alpine 3.19.0 (#251)

s2 1.1.4

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

s2 1.1.3

• 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).

s2 1.1.2

• 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).

s2 1.1.1

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

s2 1.1.0

• 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).

s2 1.0.7

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

s2 1.0.6

• 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).

s2 1.0.5

• 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).

s2 1.0.4

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

s2 1.0.3

• Fixed CRAN check errors (#80).

s2 1.0.2

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

s2 1.0.1

• 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).

s2 1.0.0

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

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.