Polygon Boundary Smoother
Smooth jagged GeoJSON Polygon and MultiPolygon boundaries with Chaikin corner cutting while preserving feature properties and validating every result.
Input
Smoothing adds vertices and moves boundaries. Start with one iteration, compare against the source, and never smooth adjacent shared boundaries independently when topology must remain exact.
Review these warnings
GeoJSON
Map preview
Understanding Polygon Boundary Smoother
Validity, topology and data quality
Smooth jagged GeoJSON Polygon and MultiPolygon boundaries with Chaikin corner cutting while preserving feature properties and validating every result.
Polygon Boundary Smoother 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
Smoothing adds vertices and moves boundaries. Start with one iteration, compare against the source, and never smooth adjacent shared boundaries independently when topology must remain exact.
After Polygon Boundary Smoother, compare changed feature counts, coordinates and shapes with the source. Automated cleaning can resolve a technical defect while introducing an unwanted geographic change.