Yes that was what exactly I need.Thanks again Nikos Alexandris wrote: > > On Mon, 2009-02-16 at 13:14 -0800, leonidas wrote: >> Thank you Niko, >> well I understand the first one (using v.extract). >> -Is it possible to do something like that using v.out.ogr and export to >> shapefile? > > AFAIK, no. The way to do it is: v.extract + v.out.ogr > > >> -As far as concerns the second question using v.to.rast, how can I export >> only specific areas using sql where clause or list for specific >> categories? > > Apologies, I overlooked the word "specific" before. Here (again) I think > you would need v.extract + v.to.rast. An example: > > Let's say you have the CORINE map in whose attribute table you have a > column named "level3" of type integer (with a lentgh of 3) which > contains the CORINE land cover class codes (111,112,113, etc.). > > And now you need to extract specific classes, that is areas with > specific "level3" codes (i.e. 111, 112, 122, 123, 141, 142). Then you > could do: > > v.extract in=corine_ellas_v2 out=corine_ellas_v2_subset > where='"level3"="111" or "level3"="112" or "level3"="112" or > "level3"="122" or "level3"="123" or "level3"="141" or "level3"="142"' > --o > > then > > v.to.rast in=corine_ellas_v2_subset out=corine_ellas_v2_subset use=attr > column=level3 > > Hope that helps > Cheers, Nikos > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > >
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