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areaOfEffect: Spatial Support at Scale

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.

Version: 0.2.4
Depends: R (≥ 3.5)
Imports: methods, sf
Suggests: lwgeom, testthat (≥ 3.0.0), knitr, rmarkdown, svglite
Published: 2026-02-06
DOI: 10.32614/CRAN.package.areaOfEffect
Author: Gilles Colling ORCID iD [aut, cre, cph]
Maintainer: Gilles Colling <gilles.colling051 at gmail.com>
BugReports: https://github.com/gcol33/areaOfEffect/issues
License: MIT + file LICENSE
URL: https://gillescolling.com/areaOfEffect/, https://github.com/gcol33/areaOfEffect
NeedsCompilation: no
Language: en-US
Materials: README, NEWS
CRAN checks: areaOfEffect results

Documentation:

Reference manual: areaOfEffect.html , areaOfEffect.pdf
Vignettes: Quick Start (source, R code)
Theory (source, R code)

Downloads:

Package source: areaOfEffect_0.2.4.tar.gz
Windows binaries: r-devel: areaOfEffect_0.2.4.zip, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): areaOfEffect_0.2.4.tgz, r-oldrel (arm64): areaOfEffect_0.2.4.tgz, r-release (x86_64): areaOfEffect_0.2.4.tgz, r-oldrel (x86_64): areaOfEffect_0.2.4.tgz

Linking:

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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