Hi Bernhard,
Ah - now I understand it - before feeding the polygons into the
"Eliminate selected polygons" I should only select the overlapping ones
detected by the Union (e.g. by using the "select by attribute" algorihm)
- and not all polygons in the layer. Makes sense. The algorithm will
Hi Andreas,
I would like to give some explanations on your comment concerning the eliminate
algorithm: During development the goal was to have a method that can get rid of
sliver polygons (I explained my workflow for detecting them in my previous
post). The algorithm simply merges the selected
Hi,
Thank you all for your feedback!
@Nyall - the GEOS/JTS capabilities for cleaning and validating geometries
look definitely interesting. Something for an upcoming QGIS-CH grant
perhaps ...
@Bernhard - I also had a look at and tested the "Eliminate selected
polygons" algorithm - but it
Hi Andreas,
the Algorithm "Eliminate selected polygons" was originally created to address
these questions. I usually imported the data into GRASS ran a clean there and
reexported the results into a non topolgical dataset. Thus overlapping areas
and gaps (only if closed) are identified and can
On Tue, 25 July 2023, 8:02 pm Andreas Neumann via QGIS-User, <
qgis-user@lists.osgeo.org> wrote:
> Hi,
>
> A friend of mine has a dirty input data set with lots of overlapping
> geometries (within the same layer) and asked me if there is a tool within
> QGIS to automatically remove the overlaps
Hi Andreas,
You could do a ' self-intersect' of the polygon layer, calculate the area,
select polygons under specific area (assuming they're small overlaps) and
run the ' eliminate selected polygons' tool.
The GRASS tool v.clean offers some solutions too.
Greetings
Wouter
Op di 25 jul 2023 om
Hi,
A friend of mine has a dirty input data set with lots of overlapping
geometries (within the same layer) and asked me if there is a tool
within QGIS to automatically remove the overlaps and assign the
overlapping area to the neighbor polygon with the largest area.
The solution was
