Package: spsurvey
Title: Spatial Sampling Design and Analysis
Version: 5.6.1
Authors@R: c(
    person("Michael", "Dumelle", role=c("aut","cre"),
           email = "Dumelle.Michael@epa.gov", comment = c(ORCID = "0000-0002-3393-5529")),
    person("Tom", "Kincaid", role="aut"),
    person("Anthony (Tony) R.", "Olsen",  role="aut"),
    person("Marc", "Weber",  role="aut"),
    person("Don", "Stevens",  role="ctb"),
    person("Denis", "White",  role="ctb"),
    person("Amanda M.", "Nahlik",  role="ctb"),
    person("Sarah", "Lehmann",  role="ctb")
    )
Maintainer: Michael Dumelle <Dumelle.Michael@epa.gov>
Description: A design-based approach to statistical inference, with a
        focus on spatial data. Spatially balanced samples are selected
        using the Generalized Random Tessellation Stratified (GRTS)
        algorithm. The GRTS algorithm can be applied to finite
        resources (point geometries) and infinite resources (linear /
        linestring and areal / polygon geometries) and flexibly
        accommodates a diverse set of sampling design features,
        including stratification, unequal inclusion probabilities,
        proportional (to size) inclusion probabilities, legacy
        (historical) sites, a minimum distance between sites, and two
        options for replacement sites (reverse hierarchical order and
        nearest neighbor). Data are analyzed using a wide range of
        analysis functions that perform categorical variable analysis,
        continuous variable analysis, attributable risk analysis, risk
        difference analysis, relative risk analysis, change analysis,
        and trend analysis. spsurvey can also be used to summarize
        objects, visualize objects, select samples that are not
        spatially balanced, select panel samples, measure the amount of
        spatial balance in a sample, adjust design weights, and more.
        For additional details, see Dumelle et al. (2023)
        <doi:10.18637/jss.v105.i03>.
Depends: R (>= 3.5.0), sf, survey (>= 4.1-1)
Imports: boot, crossdes, deldir, graphics, grDevices, lme4, MASS,
        sampling, stats, units
Suggests: knitr, testthat, rmarkdown
License: GPL (>= 3)
URL: https://usepa.github.io/spsurvey/,
        https://github.com/USEPA/spsurvey
BugReports: https://github.com/USEPA/spsurvey/issues
VignetteBuilder: knitr
Encoding: UTF-8
LazyData: true
RoxygenNote: 7.3.2
NeedsCompilation: no
Config/pak/sysreqs: libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev
        make libssl-dev libproj-dev libsqlite3-dev libudunits2-dev
Repository: https://usepa.r-universe.dev
Date/Publication: 2026-05-15 18:15:12 UTC
RemoteUrl: https://github.com/usepa/spsurvey
RemoteRef: HEAD
RemoteSha: 0914fcd071713fdab19f43d8d9a66436830bd917
Packaged: 2026-06-15 07:24:59 UTC; root
Author: Michael Dumelle [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-3393-5529>),
  Tom Kincaid [aut],
  Anthony (Tony) R. Olsen [aut],
  Marc Weber [aut],
  Don Stevens [ctb],
  Denis White [ctb],
  Amanda M. Nahlik [ctb],
  Sarah Lehmann [ctb]