[Qgis-user] RE: polygon overlay

[sit]

Hi everyone and thanks,
my problems in polygons overlapping is very important; I'm a botanist and I go in field to collect with a GPS a lot of polygons that have variations on border; I speak of about 50-100 polygons for kmq in a semester; in the "stupid" arcgis, it is very simple to paste the new polygons to the existing shape and then (with a function called clip but in the editing mask of the same shape, not beetween two files) placing them with the new border, avoiding overlapping.I'm tryng to convince my colleagues to use Q-Gis, but if this simple operation is not possible, a lot of them will not use: no one can reshape by hand a lot of polygons already collect with GPS or updated by some new administration!!
 
Please help me
 
S. 
 
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Legambiente - Comitato Regionale Siciliano
Gestione Riserve Naturali
Sistema Informativo Territoriale
sit at legambienteriserve.it
tel 00390916262697
fax 00390916264139
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Da: qgis-user-bounces at lists.osgeo.org
A: qgis-user at lists.osgeo.org
Cc: 
Data: Mon, 16 May 2011 00:19:11 +1200
Oggetto: [Qgis-user] RE: polygon overlay

> > Date: Sun, 15 May 2011 02:45:06 +0100
> > From: Giovanni Manghi 
> > Subject: Re: [Qgis-user] polygon overlay
> > To: sit 
> > 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 
> > 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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