On Dienstag, 11. März 2008 16:35:36 Corrado wrote: > Dear friends, > > 1) v.report does not allow for selecting only one polygon in a map with > many polygons. > > 2) the query button returns the length of the boundary, but not the area. > > 3) v.to.db does not allow for selecting only one polygon. > > Am I doing something wrong?
perhaps this helps: r.to.vect input= output=out feature=area v.db.addcol map=out layer=1 'columns=area double' v.to.db map=out type=point,line,boundary,centroid layer=1 qlayer=1 option=area units=meters column=area v.to.rast out output=out_area use=attr col=area --o > On Tuesday 11 March 2008 15:07:30 Corrado wrote: > > Dear friends, > > > > how do you measure the area of a polygon in grass? > > > > Best Regards > > Best Regards -- ********************************************************************** University of Wuerzburg Institute of Geography Department of Remote Sensing Am Hubland 97074 Wuerzburg, Germany @ German Aerospace Center (DLR) German Remote Sensing Data Center (DFD) Environment and Security (US) Phone: +49-(0)931-888-4797 Fax: +49-(0)931-888-4961 Email: [EMAIL PROTECTED] ********************************************************************** _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
