I am working in QGIS on a vector layer where areas are classified using an attribute "typo". The problem I'm encountering is that many polygons are duplicated or overlapping, with the result that some areas are classified as two or more "typo". This is an error. In order to make some statistical analysis I need to clean this layer removing the overlapping/duplicates so that every inch of territory is classified as one and only one "typo"; which one is indifferent.
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