Re: [R-sig-Geo] Merge polygons

2010-02-17 Thread Robert J. Hijmans
Hi Tyler, Your example would have been more easily reproducible if it had started with something like: temp = list(x=-300358, y=748992.6, X2=-300450.8, Y2=748764.8) library(spatstat) ... library(maptools) union = unionSpatialPolygons(polybuffs, ID=rep(1, times=length(polybu...@polygons)) ) plo

[R-sig-Geo] Merge polygons

2010-02-17 Thread Tyler Dean Rudolph
I've been attempting for many moons to develop a function which will allow me to place a buffer of adjustable radius around an animal's movement trajectory with which I may extract underlying pixel values from a raster of environmental data. I would like to be able to extract the habitat values us