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Questions tagged [singlepart]

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QGIS/Spatialite cluster analysis with density

beginner here I am trying to analyse a large set of points (2 millions) over a set of polygons (3000), and particularly find clusters of points. Doing it in QGIS was taking too long/crashing the ...
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1answer
148 views

Turning a single MultiPolygon into many small polygons?

I have a large GeoJSON file with a single very complex MultiPolygon, and I would like to turn it into an identical file with many small polygons. How can I do this? I can use ogr2ogr or mapshaper or ...
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59 views

Promoting to multipart using PyQGIS?

I am creating a code that aggregates neighbouring polygons if they have similar value on the field 'DN' and if they are closer than 50 m.Then I want to iterate this 3 times. I could already get the ...
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139 views

QGIS lines multipart to singlepart without splitting at self-intersection

I have a line layer and a vector grid. Now I want to count the lines in each raster. First I split the lines by intersecting the line layer with the vector grid. Second, I need to do a multipart to ...