Spatial Support at Scale R package areaOfEffect version 0.2.4 Formalizes spatial support at scale for ecological and geographical analysis. Given points and support polygons, classifies points as "core" (inside original support) or "halo" (inside scaled support but outside original), pruning all others. The default scale produces equal core and halo areas - a geometrically derived choice requiring no tuning. An optional mask enforces hard boundaries such as coastlines. Political borders are treated as soft boundaries with no ecological meaning. Software Depends: R (>= 3.5) Imports: methods, sf Suggests: lwgeom, testthat (>= 3.0.0), knitr, rmarkdown, svglite Gilles Colling <gilles.colling051@gmail.com> Comprehensive R Archive Network (CRAN) Gilles Colling [aut, cre, cph] (ORCID: <https://orcid.org/0000-0003-3070-6066>) MIT + file LICENSE (https://CRAN.R-project.org/package=areaOfEffect/LICENSE) 2026-02-06 application/tgz https://CRAN.R-project.org/package=areaOfEffect doi:10.32614/CRAN.package.areaOfEffect en-US