Ring Winding Fixer
Rewind GeoJSON Polygon and MultiPolygon rings to RFC 7946 right-hand orientation while preserving coordinates and properties.
Input
Ring order is changed only; invalid or self-intersecting rings are not repaired.
Review these warnings
GeoJSON
Map preview
Understanding Ring Winding Fixer
Validity, topology and data quality
Rewind GeoJSON Polygon and MultiPolygon rings to RFC 7946 right-hand orientation while preserving coordinates and properties.
Ring Winding Fixer checks or changes structural properties of spatial data. Geometric validity concerns rules such as ring closure and self-intersection; factual accuracy requires separate real-world verification.
How to review a repair
Ring order is changed only; invalid or self-intersecting rings are not repaired.
After Ring Winding Fixer, compare changed feature counts, coordinates and shapes with the source. Automated cleaning can resolve a technical defect while introducing an unwanted geographic change.