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

[Stefan Giese (WhereGroup)]

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

best regards
stefan
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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
> 
> ----------------------------
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