[Qgis-user] WG: Aggregation of adjacent polygons of the same type

[Sven Böhme - empirica]

-----Ursprüngliche Nachricht-----
Von: Sven Böhme - empirica 
Gesendet: Montag, 25. März 2019 10:25
An: 'Stefan Giese (WhereGroup)' <stefan.giese at wheregroup.com>
Betreff: AW: [Qgis-user] Aggregation of adjacent polygons of the same type

Hi Stefan,

maybe this helps to clarify the problem...

Thanks a lot
Sven



-----Ursprüngliche Nachricht-----
Von: Stefan Giese (WhereGroup) <stefan.giese at wheregroup.com>
Gesendet: Montag, 25. März 2019 10:11
An: Sven Böhme - empirica <boehme at empirica-institut.de>
Cc: qgis-user at lists.osgeo.org
Betreff: Re: [Qgis-user] Aggregation of adjacent polygons of the same type

Hi Sven,
can you specify your question: what is unclear and where exactly do you need support for?

best regards
stefan
---
Mit freundlichen Grüßen
Stefan Giese

Projektleiter/Consultant
-----------------------------------
Aufwind durch Wissen!
Qualifizierte Open-Source-Schulungen
bei der www.foss-academy.com
-----------------------------------
WhereGroup GmbH & Co. KG
Schwimmbadstr. 2
79100 Freiburg
Germany

Fon: +49 (0)761 / 519 102 - 61
Fax: +49 (0)761 / 519 102 - 11

stefan.giese at wheregroup.com
www.wheregroup.com
Amtsgericht Bonn, HRA 6788
-------------------------------
Komplementärin:
WhereGroup Verwaltungs GmbH
vertreten durch:
Olaf Knopp, Peter Stamm
-------------------------------

Am 2019-03-25 10:04, schrieb Sven Böhme - empirica:
> Hi!
> 
> I'm trying to aggregate neighboring polygons based on additional 
> conditions. These are:
> 
> - the polygons must be adjacent
> 
> - the polygons must be of the same type (simple value from attribute)
> 
> - the polygons should only be combined if the values of an attribute x 
> are below a certain value AND
> 
> - the polygons shall be merged with other polygons until this value is 
> reached
> 
> The polygons are grids. Aggregation should not necessarily lead to new 
> squares (as in the Quadtree-method).
> 
> I use PostGIS to store the data and QGIS for visualization and further 
> processing. For performance reasons I suspect that a 
> database-supported procession makes sense, but if QGIS (GDAL,GRASS
> etc.) offers a function, I would like to try it out.
> 
> I would be happy about support
> 
> Best regards
> 
> Sven
> 
> ----------------------------
> 
> empirica ag
> 
> Sven Böhme
> 
> Kaiserstraße 29
> 
> 53113 Bonn
> Fon +49 (0)228 91489-90
> 
> Fax +49 (0)3222 95 66 169
> 
> www.empirica-institut.de [1]
> 
> empirica ag - Zweigniederlassung Bonn - HRB 87951 Amtsgericht 
> Charlottenburg
> 
> Vorstand: Dr. Marie-Therese Krings-Heckemeier (Vorsitzende),
> 
> Ludger Baba, Dr. Reiner Braun (stellv. Vors.), Meike Heckenroth, Prof.
> Dr. Harald Simons
> 
> Aufsichtsratsvorsitzender: Klaus Arndt
> 
> KOSTENLOSER NEWSLETTER VON EMPIRICA. JETZT ANMELDEN:
> 
> https://www.empirica-institut.de/newsletter-anmelden/ [2] Diese E-Mail 
> enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn 
> Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich 
> erhalten haben, informieren Sie bitte sofort den Absender und 
> vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte 
> Weitergabe dieser Mail ist nicht gestattet. - This e-mail may contain 
> confidential and/or privileged information. If you are not the 
> intended recipient (or have received this e-mail in error) please 
> notify the sender immediately and destroy this e-mail. Any 
> unauthorized copying, disclosure or distribution of the material in 
> this e-mail is strictly forbidden.
> 
> 
> 
> Links:
> ------
> [1] http://www.empirica-institut.de/
> [2] https://www.empirica-institut.de/newsletter-anmelden/
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
-------------- next part --------------
A non-text attachment was scrubbed...
Name: aggregate_polygons.jpg
Type: image/jpeg
Size: 27877 bytes
Desc: aggregate_polygons.jpg
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20190325/598225de/attachment.jpg>