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Results tagged with dissolve
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user 99589
To merge features based on specified attributes.
9
votes
Making dissolve output as temporary layer using PyQGIS
In more recent versions of QGIS, do not forget to include the 'SEPARATE_DISJOINT' argument, see the Changelog for QGIS 3.26 for more details.
So, your code may look like this:
from qgis import process …
- 34k
4
votes
Showing only outer boundaries of polygons / features in QGIS
As an alternative approach using the "Geometry Generator" via RMC > Symbology > Symbol layer type: Geometry Generator. Keep in mind that this approach depends on the capabilities of your PC.
In the wo …
- 34k
2
votes
Accepted
Dissolving features with two fields and summing values for third field in QGIS
With the following query, it is possible to dissolve two fields while summing a third field. …
- 34k
8
votes
Accepted
Dissolving overlapping polygons without common attribute in QGIS
Use the the GDAL's "Dissolve" (GDAL > Vector geoprocessing > Dissolve) from the Processing Toolbox (Ctrl+Alt+T). …
- 34k
4
votes
Merging polygons only if three or more are on top of each other in QGIS
Use the the GDAL's "Dissolve" (GDAL > Vector geoprocessing > Dissolve) from the Processing Toolbox (Ctrl+Alt+T) with field "test" from the Step 1, and do not forget to tick the Produce one feature for …
- 34k
2
votes
Merging/Dissolving multiple layers in QGIS Virtual Layer
Another solution is to use the st_union() function for several times
SELECT
st_union(st_union(g1.geometry, g2.geometry))
FROM
"grid_test" AS g1,
"grid_test2" AS g2
Input:
Output:
- 34k