Optimal Stratification of Sampling Frames for Multipurpose Sampling Surveys R package SamplingStrata version 1.5-5 CRAN Task View: OfficialStatistics (https://CRAN.R-project.org/view=OfficialStatistics) Tools for the optimization of stratified sampling design. It determines a stratification of a sampling frame that minimizes sample cost while satisfying precision constraints in a multivariate and multidomain context. The approach relies on a genetic algorithm; each candidate partition of the frame is an individual whose fitness is evaluated via the Bethel-Chromy allocation to meet target precisions. Functions support analysis of optimization results, labeling of the frame with new strata, and drawing a sample according to the optimal allocation. Algorithmic components adapt code from the 'genalg' package. See M. Ballin and G. Barcaroli (2020) "R package SamplingStrata: new developments and extension to Spatial Sampling" <doi:10.48550/arXiv.2004.09366>. Software Depends: R (>= 3.5.0) Imports: memoise, doParallel, pbapply, SamplingBigData, glue, methods Suggests: knitr, rmarkdown, formattable Giulio Barcaroli <gbarcaroli@gmail.com> Comprehensive R Archive Network (CRAN) Giulio Barcaroli [aut, cre], Marco Ballin [aut], Hanjo Odendaal [aut], Daniela Pagliuca [aut], Egon Willighagen [aut], Diego Zardetto [aut] GPL (>= 2) 2025-10-08 application/tgz https://CRAN.R-project.org/package=SamplingStrata doi:10.32614/CRAN.package.SamplingStrata