[R-sig-Geo] Which points fall in which polygons?

[Barry Rowlingson]

On Thu, Mar 15, 2012 at 5:08 AM, Alexander Shenkin <ashenkin at ufl.edu> wrote:
> Hello folks,

> I've read the polygons in with rgdal, but I'm not sure where to go from
> there.  I'm not sure which functions from which packages apply to rgdal
> objects, etc.  I've looked at the rgdal manual, but I don't understand
> how to manipulate the objects once i have them in R (e.g. how to perform
> intersections and the like).  Any help would be greatly appreciated!
>

 You might also want to get the rgeos package which does all those
wonderful classic GIS operations like buffering and intersection.
Point-in-polygon overlay is done by over(), but rgeos also has an
implementation and far more.

 Read the R Spatial Task View for more. Shameless link to my funky
TaskView index page:
http://www.maths.lancs.ac.uk/~rowlings/R/TaskViews/

Barry