'A5' Discrete Global Grid System R package a5R version 0.3.1 Bindings for the "A5 geospatial index" <https://a5geo.org/>. 'A5' partitions the Earth's surface into pentagonal cells across 31 resolution levels using an equal-area projection onto a dodecahedron. Provides functions for indexing coordinates to cells, traversing the cell hierarchy, computing cell boundaries, and compacting/uncompacting cell sets. Powered by the 'A5' 'Rust' crate via 'extendr'. Software Depends: R (>= 4.2) Imports: cli, rlang (>= 1.1.0), units, vctrs (>= 0.6.0), wk (>= 0.9.0) Suggests: arrow, knitr, pillar, rmarkdown, sf, testthat (>= 3.0.0), tibble, withr Hugh Graham <hugh@belian.earth> Comprehensive R Archive Network (CRAN) Hugh Graham [aut, cre], belian.earth [cph] Apache License (>= 2) 2026-03-26 application/tgz https://CRAN.R-project.org/package=a5R doi:10.32614/CRAN.package.a5R