shadow: Geometric Shadow Calculations

Functions for calculating (1) shadow heights; (2) shadow footprint on ground polygons; and (3) Sky View Factor values. Inputs include a polygonal layer of obstacle outlines along with their heights, sun azimuth and sun elevation. The package also provides functions for related preliminary calculations: breaking polygons into line segments, finding segment azimuth, shifting segments by azimuth and distance, and constructing the footprint of a line of sight between an observer and the sun.

Version: 0.3.3
Depends: R (≥ 3.2.3), sp (≥ 1.1.1)
Imports: rgeos (≥ 0.3), raster (≥ 2.4-15), methods, parallel (≥ 3.4.0)
Suggests: knitr, rmarkdown, bookdown, maptools (≥ 0.8), testthat, plyr (≥ 1.8.4), reshape2 (≥ 1.4.2)
Published: 2017-06-14
Author: Michael Dorman [aut, cre], Evyatar Erell [ctb], Itai Kloog [ctb], Adi Vulkan [ctb]
Maintainer: Michael Dorman <dorman at>
License: MIT + file LICENSE
NeedsCompilation: no
Materials: NEWS
CRAN checks: shadow results


Reference manual: shadow.pdf
Vignettes: Introduction to package 'shadow'
Package source: shadow_0.3.3.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X El Capitan binaries: r-release: shadow_0.3.3.tgz
OS X Mavericks binaries: r-oldrel: shadow_0.3.0.tgz
Old sources: shadow archive


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