Cleans a polygon layer: real geometry correction (makeValid + duplicate nodes + buffer 0, QGIS-internal validation), removal of strong overlaps (> threshold), duplicates, full containments, slivers and tiny areas (to a "deleted" layer), and detection + annotation of weak overlaps (<= threshold) with their percentage.
Polygon Verifier by JDK detects overlaps between polygons, computes the overlap ratio relative to the smaller polygon, removes duplicates and overlaps above a business threshold (18 percent by default) while keeping the most reliable polygon (most valid geometry, then largest area, then oldest ID), repairs invalid geometries and produces a clean layer plus a report (PDF/CSV/TXT). Designed for land, cadastral, agricultural, forestry and EUDR/RA compliance workflows. Optimized for large datasets (R-tree spatial index, background processing).
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