Well, my innput has not been so useful, but yours do :-) cgal stands for "computational geometry algorithms library"? If yes, I will ask you a thing later...
How do you call system commands from R? Giovanni 2008/3/31, Murray Richardson <[EMAIL PROTECTED]>: > Actually I am currently running an R script to link output from cgal > routines to postGIS which allows me to handle massive tables and has > some other advantages for my problem. However, this clarifies the > import export option somewhat (although I just learned that I can invoke > ogr2ogr as a system command which would be a faster option I guess. > > Thanks for you input. > > > Murray > > > > > G. Allegri wrote: > > 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 [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
