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MultiPolygon / multipart
GeometryDisjoint parts (islands, exclaves) must all be filled; a single-ring assumption drops parts.
Detection
Geometry type is MultiPolygon.
Mitigation
- Iterate all parts
- Preserve part membership in provenance
Affected conversions
- PolygonH3 (intersects)
- Admin polygonsH3 (weighted crosswalk)