Visibility Analysis in R
On Sat, Apr 21, 2012 at 1:38 PM, Raphael Fuhrer
<raphael.fuhrer at gmail.com> wrote:
Dear all Does anybody know if it is possible to conduct a visibility analysis in R? I have - a large set of points = observer points - a digital surface model as an ascii grid - a set of points and polygons defining an amount of grid cells of interest For every individual observer point, the task is to check how many cells of interest are visible. Since the number of observer points is limited to 8 in ArcGIS and calculation time is far too long, I decided to use R. Unfortunately, I could not find any helpful packages or information on the internet.
I suspect your best option is to use GRASS-GIS, and there is a package for R-GRASS integration but I don't know much about it: http://cran.r-project.org/web/packages/spgrass6/index.html The relevant GRASS module is r.viewshed (r here stands for raster, not R): http://grass.osgeo.org/manuals/html70_user/r.viewshed.html Free and open source, of course it is! Barry