I have made some web search but coultn't find any answer regarding how to perform viewshed analysis in R without the use of external tools (e.g., GRASS). I do know that a number of interesting packages are available in R to perform viartually all types of GIS-related operations, from visualization to spatial analysis with all which lies in-between, but I seem to not have found anything regarding viewshed.
I need to have a package which does not require the use of external tools, such as GRASS or ArcGIS for instance.
rpygeo.Viewshed.sa
at cran.r-project.org/web/packages/RPyGeo/RPyGeo.pdf ? – PolyGeo♦ Feb 21 '18 at 7:50