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Thiessen polygons are polygons (generated from a set of points) whose boundaries define the area that is closest to each point relative to all other points. Thiessen polygons are mathematically defined by the perpendicular bisectors of the lines between all points and are created by means of a triangulated irregular network (TIN) structure.
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Strange results with Voronoi polygons in QGIS
The base of the voronoi tessalation is a triangulation between the points. The edges of this triangulation are cut on half distance between two points. This is the position where the edge of the tessa …