Hi, 2008/1/22, Neil Godfrey <[EMAIL PROTECTED]>: > The census 2000 administrative boundaries are shapefiles, where every > county is a separate file. So v.in.ogr creates a layer for every > county. So for example, I get 83 layers for the 83 counties in > Michigan, which correspond to 83 tables, each with just one category. > > What I want is one layer with 83 categories. I've had no luck with > v.overlay, v.extract, v.patch, etc. because all those tools preserve the > layers in the output map. > > Is there any way to do this?
If the attribute tables have the same structure (number of columns, data types and key column), you can patch maps using v.patch -e in=`g.mlist vect pat='con*' out=con_patch v.clean in=con_patch out=con_clean tool=snap,break,rmdupl thresh=[value] ? Martin -- Martin Landa <[EMAIL PROTECTED]> * http://gama.fsv.cvut.cz/~landa * _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user