Dear Henk, My experiences is that the easiest way to read KML files and convert them to sp-type of objects is to use the XML package.
Here is a small example: > library(XML) > meuse_lead.kml <- xmlTreeParse("meuse_lead.kml") > lengthp <- length(meuse_lead.kml$doc[[1]][[1]][[1]])-1 > lead_sp <- data.frame(Longitude=rep(0,lengthp), Latitude=rep(0,lengthp), > Var=rep(0,lengthp)) > for(j in 1:lengthp) { > LatLon <- > unclass(meuse_lead.kml$doc[[1]][[1]][[1]][j+1][[1]][2][[1]][[1]][[1]])$value > Var <- > unclass(meuse_lead.kml$doc[[1]][[1]][[1]][j+1][[1]][1][[1]][[1]])$value > lead_sp$Longitude[[j]] <- as.numeric(matrix(unlist(strsplit(LatLon, > split=",")), ncol=2)[1]) > lead_sp$Latitude[[j]] <- as.numeric(matrix(unlist(strsplit(LatLon, > split=",")), ncol=2)[2]) > lead_sp$Var[[j]] <- as.numeric(matrix(unlist(strsplit(strsplit(Var, > split="<i>")[[1]][2], split="</i>")), ncol=2)[1]) > } > coordinates(lead_sp) <-~Longitude+Latitude > proj4string(lead_sp) <- CRS("+proj=longlat +ellps=WGS84") > bubble(lead_sp, "Var") every KML can have a completely different structure, so you will need to modify position of coordinates / variables where needed. see also: http://spatial-analyst.net/wiki/index.php?title=Export_maps_to_GE HTH -----Original Message----- From: r-sig-geo-boun...@stat.math.ethz.ch [mailto:r-sig-geo-boun...@stat.math.ethz.ch] On Behalf Of Edzer Pebesma Sent: Tuesday, January 06, 2009 12:16 PM To: Henk Sierdsema Cc: r-sig-geo@stat.math.ethz.ch Subject: Re: [R-sig-Geo] Converting kml to shape (readOGR) Henk Sierdsema wrote: > Hi, > > I've been trying to convert a vector kml-file to an ESRI shape with > readOGR(), but I don't manage to read the kml-file. Can anyone help me with this? > http://www.gdal.org/ogr/ogr_formats.html mentions at KML that "read support needs libexpat". Further it says "KML reading is only available if GDAL/OGR is built with the Expat XML Parser, otherwise only KML writing will be supported." Maybe this was missing while your gdal/rgdal was built? -- Edzer > Thnx, > > Henk Sierdsema > > > SOVON Vogelonderzoek Nederland / SOVON Dutch Centre for Field Ornithology > > Rijksstraatweg 178 > 6573 DG Beek-Ubbergen > The Netherlands > tel: +31 (0)24 6848145 > fax: +31 (0)24 6848122 > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- Edzer Pebesma Institute for Geoinformatics (ifgi), University of Münster Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251 8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de/ http://www.springer.com/978-0-387-78170-9 e.pebe...@wwu.de _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo