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Antimeridian (±180° meridian)
GlobalGeometries crossing ±180° longitude wrap incorrectly, producing world-spanning artifacts when treated as planar.
Detection
Ring longitude span > 180° or sign change across ±180°.
Mitigation
- Split geometry at the antimeridian
- Densify edges along great circles
- Use h3 isGeoJson handling / unwrap longitudes
Affected conversions
- H3exact polygon
- PolygonH3 (intersects)
- Point+radiusH3