Can voronoi polygons calculated in R be converted to ESRI shapefile?
On Tue, 13 Nov 2007, Debarchana Ghosh wrote:
Hi, I have a point data frame with X and Y coordinates, where n=1051. I am trying to create Voronoi polygons using both the Tripack and PBSMapping packages. library(tripack) testbird.vm<-voronoi.mosaic(testbird$X, testbird$Y) testbird.vp<-voronoi.polygons(testbird.vm) plot(testbird.vp) library(PBSMapping) testbirdvor<-calcVoronoi(testbird)
From here how can I create an ESRI shapefile of the voronoi polygons in R
and export to ArcGIS for further use.
There is a thread at: http://article.gmane.org/gmane.comp.lang.r.geo/1275 which shows how to make a SpatialPolygonsDataFrame from deldir output (deldir closes the infinite polygons and clips large closed ones, but tripack does not). Could you please post with a short recipe once you resolve this, it is do-able, but the original thread touches on other things too, that are not relevant here. Roger
Thanks for the help, Debs.
Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no