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.


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install.packages("shadow")

0.3.5 by Michael Dorman, 2 months ago


Browse source code at https://github.com/cran/shadow


Authors: Michael Dorman [aut, cre], Evyatar Erell [ctb], Itai Kloog [ctb], Adi Vulkan [ctb]


Documentation:   PDF Manual  


MIT + file LICENSE license


Imports rgeos, raster, methods, parallel

Depends on sp

Suggests knitr, rmarkdown, bookdown, maptools, testthat, plyr, reshape2


See at CRAN