Hi Murray. About the first question. As far as I understand, you're working in R on a *imported* PostGIS layer (I suppose you use rgdal to do it, right?). Then you would need to export it to a shapefile (easily done with writeOGR). Why are you considering the use of ogr2ogr? As you probably know, it's a binary callable from a command line, and it's not possible (AFAIK) to do it from R...
I dont' understand your second question... > Or even better could ogr be used to do this directly on a postGIS layer? What do you mean? Giovanni _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo