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Changelog

Source: NEWS.md

dggridR 4.1.1

  • Fixed segmentation fault on Debian/Linux during package loading caused by RCPP_USE_GLOBAL_ROSTREAM global initialization in RcppExports.cpp.
  • Fixed integer truncation warnings by replacing C abs() with std::abs() for long long arguments in DGGRID headers.

dggridR 4.1.0

  • dgconstruct() gains aperture = 7 for ISEA7H / FULLER7H hexagonal grids.
  • dgconstruct() gains aperture_type = "MIXED43" with num_aperture_4_res for ISEA43H / FULLER43H mixed-aperture grids.
  • dgconstruct() gains orient = "RANDOM" for a uniformly random icosahedral orientation (reproducible via set.seed()).
  • New dgneighbors(dggs, cells) returns the adjacent cell IDs for each input cell (hexagonal grids only).
  • New dgchildren(dggs, cells) returns the child cell IDs at the next finer resolution.
  • New dgparent(dggs, cells) returns the parent cell ID at the next coarser resolution.
  • New dgpoints_to_cells(dggs, lon, lat) maps lon/lat points to grid cells and returns an sf grid with optional per-cell counts.
  • New dgbin_points(dggs, lon, lat, values) aggregates point data into grid cells, returning per-cell count, mean, and/or total as a data frame.
  • dgearthgrid() and dgcellstogrid() gain a densify parameter to insert extra vertices along cell edges for smoother boundaries.
  • dgearthgrid() and dgcellstogrid() now materialize sf polygon grids through a native C implementation using R’s C API, preserving DGGRID ring order and avoiding the previous s2/collapse polygon construction path. Illustrative conversion timings for full-earth grids improved from 3.854s to 0.150s at res 9 (~26x). This is achieved also via the wk package.
  • pkgdown site added at https://sebkrantz.github.io/dggridR/.

dggridR 4.0.0

  • Updated bundled DGGRID C++ engine to v9.0b (upstream SebKrantz/DGGRID).
  • Re-architected DgIDGGSBase::makeRF() call for new v9.0b parameter order (isApSeq, DgApSeq, hierNdxSysType).
  • update_from_upstream.sh rewritten for macOS compatibility (Perl-based text transforms) and updated to track SebKrantz/DGGRID.
  • Fixed numeric precision issue on Apple Silicon introduced by DGGRID v9.0b.
  • New DeepWiki AI documentation at https://deepwiki.com/r-barnes/dggridR.

dggridR 3.1.1

CRAN release: 2026-01-20

  • Bumped R dependency to 4.1.0 to fix CRAN issues.

dggridR 3.1.0

CRAN release: 2024-07-26

  • Fixed a numeric precision issue on Apple Silicon (#63).
  • Removed dplyr, rlang, and sp as dependencies; added collapse and s2 (zero additional transitive dependencies), yielding significant performance gains especially in grid materialization.
  • dgshptogrid() now accepts an sf object in memory in addition to a shapefile path.
  • dgcellstogrid(), dgearthgrid(), dgrectgrid(), and dgshptogrid() gain return_sf = TRUE; setting return_sf = FALSE returns a memory-efficient long data frame of cell-vertex coordinates.

dggridR 3.0.0

CRAN release: 2023-01-18

  • Fixes memory leaks in DGGRID.
  • Switches from rgdal to the sf package.
  • dgtransform() removed (previously deprecated); use dgGEO_to_SEQNUM() instead.

dggridR 2.0.3

CRAN release: 2018-04-06

dggridR 2.0.0

  • Complete restructuring of the internal C++ engine for improved speed and robustness across operating systems.
  • Restructured engine directory layout to reduce compilation complexity.
  • dg_shpfname_south_africa() converted from an object to a function.

dggridR 1.0.0

  • dgconstruct() gains azimuth, pole_lat, and pole_lon parameters.
  • Added pentagon location map to the vignette.

dggridR 0.1.0 and earlier

  • Initial development releases: grid generation, shapefile support (dgshptogrid()), debugging utilities, FLOSS licensing via Clipper, and various compiler-compatibility and CRAN-compliance fixes.