[Qgis-user] length...

[Lionel Roubeyrie]

The ET GeoWizard toolbox for ArcView puts geometry columns in a new
shapefile... certainly safier!

Le vendredi 13 mars 2009 à 11:05 +0200, Micha Silver a écrit :
> Carson Farmer wrote:
> 
> > T,
> >
> > To get the column length, you can use the export/add geometry function 
> > in fTools, which will create a copy of the dataset (as a shapefile) 
> > with an additional length field (or it will populated the length field 
> > if it already exists). From this you can use the compute basic 
> > statistics function to get the sum of the field...
> >
> Any chance to alter the fTools plugin so that the geometry functions 
> stick the new columns straight into the original shapefile? I can't 
> think of any situation where you'd need to keep both the original shape 
> without the geometry attribute and the new one with. 
> Other GIS software (i.e. GRASS as John Tull pointed out, as well as 
> Arc*) just add the length/perimeter, X-Y  or area column into the 
> existing vector layer.
> 
> A minor annoyance, but it would be nice...
> Thanks,
> Micha
> > Hopefully that's what you are looking for?
> >
> > Carson
> >>
> >>
> >> HI everybody
> >> i hope someone can help me with this:
> >> in a poly-line vector layer, which is obviously built of several 
> >> festures, how can i add a column of LENGTH to the attribute table? 
> >> then how can i SUM all of it?
> >>
> >> THNX
> >> T
> >> ------------------------------------------------------------------------
> >>
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> >
> 
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-- 
Lionel Roubeyrie
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LIMAIR - La Surveillance de l'Air en Limousin
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