Hi Tim, I am not quite sure what you are getting at here. Do you want to intersect polygons and then select the set of lines that form the outer perimeter? Do you wan the convex hull of a set of polygons. I guess I have been out of the GIS world to long. It seems to me that this would be something easy to solve, just tedious iteration of the polygon coordinates and some triangulation.
Nicholas > Date: Thu, 15 Mar 2007 10:49:23 -0500 > From: "Tim Keitt" <[EMAIL PROTECTED]> > Subject: [R-sig-Geo] polygons to arcs? > To: r-sig-geo@stat.math.ethz.ch > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Is there an 'sp' function that takes a polygon as its argument and > returns a set of line objects corresponding to the arcs in the > polygon? > > Or better yet, a function that given a set of polygons, returns the > hull? (ie the set of singleton arcs after applying the polys to arcs > function) > > THK > > -- > Timothy H. Keitt, University of Texas at Austin > Contact info and schedule at http://www.keittlab.org/tkeitt/ > Reprints at http://www.keittlab.org/tkeitt/papers/ > ODF attachment? See http://www.openoffice.org/ > > > _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
