This node creates Voronoi (Thiessen) polygons from the input point data according to the reference boundary. The input data for the reference boundary should be a Polygon or MultiPolygon.
The buffer distance with the provided unit is used to create dummy points that define a virtual boundary around the given reference boundary that controls the output of the Voronoi polygons. If the final Voronoi polygons are smaller than the given reference boundary, you might want to increase the buffer distance. For an illustration of the buffer distance see here.
Select the geometry column with the points for the Voronoi (Thiessen) polygons.
Select the geometry column with the Polygon or MultiPolygon that defines the reference boundary for the Voronoi (Thiessen) polygons.
The buffer distance defines the distance of the dummy points that define the virtual boundary from the given reference boundary.
If the buffer distance is too small, the resulting polygons may not fill the entire reference boundary, resulting in gaps or missing parts within it. This is because the buffer distance determines how far away from the reference boundary the Voronoi polygons will be generated, and if the distance is too small, some of the polygons may not intersect with the reference boundary or may only partially intersect with it. For an illustration of the buffer distance see here.
Choose the distance unit to use.
If checked the CRS of the input table is retained even if a re-projection was necessary for the selected distance unit.
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