On 10/02/11 21:56:02, gianni lavaredo wrote: > I have a points shapefile with wave shape. I wish to select only the border > points to create a border owin with the same wave shape. I tryed to use > convex.hull but the final shape is not the same. Some researchers have some > suggestions?
I once had a similar issue when I wanted to create a hull (i.e. select only the border points) for a non-convex set of points, so-to-say. I ended up doing some approximation and also came across the alphahull package. Maybe "ahull" in that package with a suitable "alpha" parameter can help. Georg. -- Research Assistant Otto-von-Guericke-Universität Magdeburg resea...@georgruss.de http://research.georgruss.de _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo