Interactive publication
Back to the catalogueGlobalCase 01 of 12
Antimeridian (±180° meridian)
Geometries crossing ±180° longitude wrap incorrectly, producing world-spanning artifacts when treated as planar.
Class
Case to account for
Affects
3 conversions
01
Detection
Ring longitude span > 180° or sign change across ±180°.
02
Mitigation
01
Split geometry at the antimeridian
02
Densify edges along great circles
03
Use h3 isGeoJson handling / unwrap longitudes
03
Affected conversions
H3exact polygon
OPENPolygonH3 (intersects)
OPENPoint+radiusH3
OPEN