Dear David
Thanks for your prompt reply.
I understood the need for intersection between lines and polygons. But the
polygonal layer I work on can have thousands of polygons, and manually
lengthening the lines is not ....feasible. A procedure would be needed to
automate this operation. Or, an alternative method (transforming the line
divide layer into polygons, or other procedures that can be implemented
automatically, I don't know).
Regards
-----Messaggio originale-----
Da: Qgis-user <qgis-user-boun...@lists.osgeo.org> Per conto di
qgis-user-requ...@lists.osgeo.org
Inviato: mercoledì 10 giugno 2020 19:02
A: qgis-user@lists.osgeo.org
Oggetto: Qgis-user Digest, Vol 172, Issue 15
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Contents of Qgis-user digest..."
Today's Topics:
1. Re: Cut shapefiles (Richard McDonnell)
2. Re: QGIS mailing lists in NABBLE (Andrea Giudiceandrea)
3. Re: Cut shapefiles (r.cho...@hotmail.com)
4. Re: QGIS mailing lists in NABBLE (Andrea Giudiceandrea)
5. split polygon with lines seems not working correctly
(Luigi Raffaele Sapone)
6. Re: split polygon with lines seems not working correctly
(David Greenewalt)
----------------------------------------------------------------------
Message: 1
Date: Wed, 10 Jun 2020 08:35:03 +0000
From: Richard McDonnell <richard.mcdonn...@opw.ie>
To: Riccardo D'Alvito <r.cho...@hotmail.com>,
"qgis-user@lists.osgeo.org" <qgis-user@lists.osgeo.org>
Subject: Re: [Qgis-user] Cut shapefiles
Message-ID: <3acfb00ccdf0493db4b8e0ea7f197...@opw.ie>
Content-Type: text/plain; charset="utf-8"
Hi Riccardo,
You could try the Split with Lines tool available in the Processing Toolbox,
under Vector Overlay. Just use "Split" in the search bar to narrow down the
list.
Hope this helps,
Richard
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Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management
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From: Qgis-user <qgis-user-boun...@lists.osgeo.org> On Behalf Of Riccardo
D'Alvito
Sent: 09 June 2020 17:43
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Cut shapefiles
Good evening.
I would like to cut a shapefile of areas with respect to a shapefile of lines
in order to have a resulting shapefile of areas formed by the contours of the
various lines.
In other words, "Polygon" has a larger extension than "Lines" . I would like to
create another area shape made up of various polygons divided according to the
outline of the "Lines" shapefile.
I hope I was clear.
Thanks
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Message: 2
Date: Wed, 10 Jun 2020 02:51:27 -0700 (MST)
From: Andrea Giudiceandrea <andreaer...@libero.it>
To: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] QGIS mailing lists in NABBLE
Message-ID: <1591782687069-0.p...@n6.nabble.com>
Content-Type: text/plain; charset=us-ascii
Richard Duivenvoorde wrote
> ?aybe contact Nabble, as personally I am not aware that we arranged
> something with them?
>
> We use osgeo-mailing lists, I'm not aware of any changes recently.
> Are other mailing lists affected?
Hi Stefano and Richard,
all the OSGeo ML were affected.
I sent an e-mail message to the OSGeo Nabble Admin two days ago, and after a
few attempts, now it's allowed to post new message or replay to messages via
Nabble again.
Regards
Andrea Giudiceandrea
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------------------------------
Message: 3
Date: Wed, 10 Jun 2020 12:15:25 +0200
From: r.cho...@hotmail.com
To: Richard McDonnell <richard.mcdonn...@opw.ie>
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Cut shapefiles
Message-ID:
<db6p18901mb02151c54df33ba300040d69f9f...@db6p18901mb0215.eurp189.prod.outlook.com>
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Message: 4
Date: Wed, 10 Jun 2020 04:01:52 -0700 (MST)
From: Andrea Giudiceandrea <andreaer...@libero.it>
To: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] QGIS mailing lists in NABBLE
Message-ID: <1591786912755-0.p...@n6.nabble.com>
Content-Type: text/plain; charset=us-ascii
Andrea Giudiceandrea wrote
> now it's allowed to post new message or replay to messages via Nabble
> again.
Actually... with the exception, form QGIS MLs, of QGIS Italian User
(qgis-it-user) and QGIS - Community Team (qgis-community-team).
For the former, Jorge Sanz. the OSGeo Nabble Admin, said that the Italian group
apparently had more restrictive settings so he decided to keep them untouched,
for the latter, I don't know why but maybe due to the same reason.
Regards.
Andrea
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------------------------------
Message: 5
Date: Wed, 10 Jun 2020 15:31:09 +0000
From: Luigi Raffaele Sapone <studioingsap...@live.com>
To: "qgis-user@lists.osgeo.org" <qgis-user@lists.osgeo.org>
Subject: [Qgis-user] split polygon with lines seems not working
correctly
Message-ID:
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Content-Type: text/plain; charset="utf-8"
Hello
I'm using QGIS 3.12
I have a poly shapefile named building.shp in the zip file, and a line
shapefile, named line.shp.
I'm using the geoprocessing function 'split polygon by line' using poly.shp as
input, and line.shp as divide layer.
I obtain the 'split_by_line.shp'. But, in this splitted file, the polygon was
not divided considering all the lines present, but only some of them, as
visible in 'split_by_line.shp'.
Is there something wrong?
Regards
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Message: 6
Date: Wed, 10 Jun 2020 12:56:46 -0400
From: David Greenewalt <d...@sover.net>
To: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] split polygon with lines seems not working
correctly
Message-ID: <95389106-835d-3eaf-cf5f-ca255c8f0...@sover.net>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"
Luigi,
The lines must fully transect the polygon in order to split. The dotted lines
in the image are examples of such lines.
Hope this helps,
David
On 6/10/2020 11:31 AM, Luigi Raffaele Sapone wrote:
>
> Hello
>
> I’m using QGIS 3.12
>
> I have a poly shapefile named building.shp in the zip file, and a line
> shapefile, named line.shp.
>
> I’m using the geoprocessing function ‘split polygon by line’ using
> poly.shp as input, and line.shp as divide layer.
>
> I obtain the ‘split_by_line.shp’. But, in this splitted file, the
> polygon was not divided considering all the lines present, but only
> some of them, as visible in ‘split_by_line.shp’.
>
> Is there something wrong?
>
> Regards
>
>
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