Package: viewscape
Type: Package
Title: Viewscape Analysis
Version: 3.0.0
Authors@R: c(person("Xiaohao", "Yang", role = c("aut", "cre", "cph"), email = "xiaohaoy@umich.edu"),
           person("Nathan", "Fox", role = c("aut")),
           person("Derek", "Van Berkel", role = c("aut")),
           person("Mark", "Lindquist", role = c("aut")))
Description: Provides tools for viewscape analysis from one or multiple
        viewpoints using a digital surface or elevation model. Core
        functionality includes computing viewsheds, quantifying visual
        magnitude, calculating a suite of viewscape configuration
        metrics (extent, depth, relief, Sky View Factor, skyline
        variation, and patch-based landscape structure), Shannon
        Diversity Index and land cover feature proportions within the
        visible area, pairwise intervisibility networks, panoramic view
        generation, and visualizing results as rasters or polygons.
        Viewscape configuration metrics follow the methods of Tabrizian
        et al. (2020) <doi:10.1016/j.landurbplan.2019.103704>. The
        viewshed algorithm is based on Franklin & Ray (1994)
        <https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=555780f6f5d7e537eb1edb28862c86d1519af2be>
        and Wang et al. (2000) <doi:10.14358/PERS.66.1.87>. Visual
        magnitude is derived from Chamberlain & Meitner (2013)
        <doi:10.1016/j.landurbplan.2013.01.003>. Sky View Factor is
        computed following Oke (1981) <doi:10.1002/joc.3370010304> as
        implemented in the 'shadow' package (Dorman et al. 2019)
        <doi:10.32614/RJ-2019-024>.
URL: https://github.com/billbillbilly/viewscape
BugReports: https://github.com/billbillbilly/viewscape/issues
Depends: R (>= 4.2)
License: GPL-3
Encoding: UTF-8
Roxygen: list(markdown = TRUE)
RoxygenNote: 7.3.2
Remotes: billbillbilly/greenSD, billbillbilly/dsmSearch
Suggests: testthat (>= 3.0.0), knitr, rmarkdown, greenSD, dsmSearch
Config/testthat/edition: 3
VignetteBuilder: knitr, rmarkdown
biocViews:
Imports: Rcpp, rlang, methods, dplyr, sf, sp, terra, ForestTools (>=
        1.0.1), parallel, pbmcapply
LinkingTo: Rcpp
Config/pak/sysreqs: libabsl-dev cmake libfftw3-dev libgdal-dev gdal-bin
        libgeos-dev libglpk-dev libicu-dev libjpeg-dev libpng-dev
        libtiff-dev libxml2-dev libssl-dev libproj-dev libsqlite3-dev
        libudunits2-dev libx11-dev
Repository: https://billbillbilly.r-universe.dev
Date/Publication: 2026-06-20 23:38:48 UTC
RemoteUrl: https://github.com/billbillbilly/viewscape
RemoteRef: HEAD
RemoteSha: bea8a6b6373e47f469f896e98ba3e578b8acece5
NeedsCompilation: yes
Packaged: 2026-06-28 09:02:46 UTC; root
Author: Xiaohao Yang [aut, cre, cph],
  Nathan Fox [aut],
  Derek Van Berkel [aut],
  Mark Lindquist [aut]
Maintainer: Xiaohao Yang <xiaohaoy@umich.edu>