GeoJSON Fixer
Apply conservative GeoJSON fixes such as removing duplicate consecutive coordinates and closing otherwise valid polygon rings.
Input
Only findings classified as safe fixes are changed. Axis swaps, reprojection, antimeridian splitting, and self-intersection repair require review.
Review these warnings
GeoJSON
Map preview
Understanding GeoJSON Fixer
Validity, topology and data quality
Apply conservative GeoJSON fixes such as removing duplicate consecutive coordinates and closing otherwise valid polygon rings.
GeoJSON 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
Only findings classified as safe fixes are changed. Axis swaps, reprojection, antimeridian splitting, and self-intersection repair require review.
After GeoJSON Fixer, compare changed feature counts, coordinates and shapes with the source. Automated cleaning can resolve a technical defect while introducing an unwanted geographic change.