Spatial Parallel Computing by Hierarchical Data Partitioning R package chopin version 0.9.9-5 Geospatial data computation is parallelized by grid, hierarchy, or raster files. Based on 'future' (Bengtsson, 2024 <doi:10.32614/CRAN.package.future>) and 'mirai' (Gao et al., 2025 <doi:10.32614/CRAN.package.mirai>) parallel back-ends, 'terra' (Hijmans et al., 2025 <doi:10.32614/CRAN.package.terra>) and 'sf' (Pebesma et al., 2024 <doi:10.32614/CRAN.package.sf>) functions as well as convenience functions in the package can be distributed over multiple threads. The simplest way of parallelizing generic geospatial computation is to start from par_pad_*() functions to par_grid(), par_hierarchy(), or par_multirasters() functions. Virtually any functions accepting classes in 'terra' or 'sf' packages can be used in the three parallelization functions. A common raster-vector overlay operation is provided as a function extract_at(), which uses 'exactextractr' (Baston, 2023 <doi:10.32614/CRAN.package.exactextractr>), with options for kernel weights for summarizing raster values at vector geometries. Other convenience functions for vector-vector operations including simple areal interpolation (summarize_aw()) and summation of exponentially decaying weights (summarize_sedc()) are also provided. Software Depends: R (>= 4.1) Imports: anticlust, cli, dplyr (>= 1.1.0), exactextractr (>= 0.8.2), future, future.apply, igraph, methods, rlang, sf (>= 1.0-10), sfheaders, stars (>= 0.6-0), terra (>= 1.7-18), mirai (>= 1.3.0), collapse Suggests: covr, devtools, targets, DiagrammeR, future.mirai, knitr, lifecycle, rmarkdown, spatstat.random, testthat (>= 3.0.0), units, withr, dggridR, h3r Insang Song <geoissong@gmail.com> Comprehensive R Archive Network (CRAN) Insang Song [aut, cre] (ORCID: <https://orcid.org/0000-0001-8732-3256>), Kyle Messier [aut, ctb] (ORCID: <https://orcid.org/0000-0001-9508-9623>), Alec L. Robitaille [rev] (Alec reviewed the package version 0.6.3 for rOpenSci, see <https://github.com/ropensci/software-review/issues/638>), Eric R. Scott [rev] (Eric reviewed the package version 0.6.3 for rOpenSci, see <https://github.com/ropensci/software-review/issues/638>) MIT + file LICENSE (https://CRAN.R-project.org/package=chopin/LICENSE) 2026-04-03 application/tgz https://CRAN.R-project.org/package=chopin doi:10.32614/CRAN.package.chopin