[Qgis-user] RE: polygon overlay

[Alister Hood]

> Date: Sun, 15 May 2011 02:45:06 +0100
> From: Giovanni Manghi <giovanni.manghi at gmail.com>
> Subject: Re: [Qgis-user] polygon overlay
> To: sit <sit at legambienteriserve.it>
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <1305423906.10867.1.camel at sibirica>
> Content-Type: text/plain; charset="UTF-8"
> 
> On Sat, 2011-05-14 at 20:01 +0200, sit wrote:
> > Please,
> > If I have two polygons that overlap in a vector, how can I cut one of
> > them on the border of the other (the clip function in arcview)?
> > Thank you 
> 
> vector->geoprocessing tools->clip
> 
> cheers
> 
> -- G --
> 
> 
> ------------------------------
> Date: Sun, 15 May 2011 08:05:23 +0200
> From: Matteo Mura <mur.teo at gmail.com>
> Subject: [Qgis-user] RE: polygon overlay (sit)
> To: sit at legambienteriserve.it
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <4125F620-8FCD-48F5-98FD-4CDABFEA7EF8 at gmail.com>
> Content-Type: text/plain; charset=us-ascii
> 
> Hi 
> first of all you should install the fTools plug-in, then from the menu bar: Vector > Geoprocessing tools > Clip 
> 
> input vector: vector to clip
> clip vector: vector which use  the boundary to make the clip
> 
> i hope iwas useful, otherwise ask again
> 
> Matteo

Hi everyone, I could be wrong, but I thought they were asking how to use an object to clip another object in the same layer.

Ftools can only use all the objects in a layer to clip all the objects in a different layer, producing a new layer.  This can obviously still be used to achieve the desired outcome, but it will require the use of several temporary files and copying and pasting objects between files.

It would be very nice if features like clipping were implemented kind of as advanced digitising features, so they could operate with/on selected features.  But I imagine this would need a reasonable amount of work from someone.


Alister
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