Computes the area-weighted average of point station data (rainfall, irrigation water requirement, discharge, etc.) using the Thiessen (Voronoi) polygon method.
This plugin generates Thiessen polygons (a Voronoi diagram) from point data such as meteorological or irrigation stations, optionally clips them to an irrigation area boundary, and computes the area-weighted average value (e.g. area-weighted average rainfall or irrigation water requirement) based on each polygon's area. AREA_HA, AREA_PCT and WEIGHT_CONTRIB fields are added to the result layer.
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