I have several large shapefiles that I need to use to draw a map. I want to simplify the files and then save the output so that I can use them again. The methods that I have tried do not allow me to save the simplified output as a shapefile. I have tried: thinnedSpatialPoly in the package maptools, but I understand that you cannot save the output as a shapefile because the topographical features are not preserved. I have also tried Antarctica2<-gSimplify(Antarctica,tol=0.1,topologyPreserve=TRUE)> write.shapefile(Antarctica2, "Antarctica2_simple")Error in shapefile$shp : no $ method for object without attributes but it doesn't work either, I tried simplifying the shapefiles using simplify in geospatial modelling environment, but R would not read in the resulting files and gave this error message: Error in `rownames<-`(`*tmp*`, value = c("27", "67", "109", "723", "963", : attempt to set rownames on object with no dimensions Any help would be gratefully received, bw -- View this message in context: http://r.789695.n4.nabble.com/simplify-shapefile-and-save-output-tp4567029p4567029.html Sent from the R help mailing list archive at Nabble.com.