geo-split is a small set of utilities to split GeoJSON geometries given in geographic coordinates. This includes handling for discontinuities at -180,180 degrees longitude.

Most GeoJSON renderers cannot distinguish the user intent for geometries with coordinates that cross -180/180 degrees longitude. Due to this, renderers will often opt to wrap them around the world, producing unintended visual artifacts. geo-split fixes this by splitting geometries around these discontinuities.

npm i geo-split 

Consider the polygon which crosses the antimeridian:

const polygon = { geometry: { coordinates: [ [ [170, 2], [175, 4], [-178, 8], [173, 7], [170, 2] ] ], type: "Polygon" }, type: "Feature" }; 

The split polygon now straddles the antimeridian:

const split = splitPolygonAntimeridian(polygon); { geometry: { coordinates: [ [ [ [170, 2], [175, 4], [180, 6.857142857142858], [180, 7.777777777777778], [173, 7], [170, 2], ], ], [ [ [-180, 6.857142857142858], [-178, 8], [-180, 7.777777777777778], [-180, 6.857142857142858], ], ], ], type: "MultiPolygon" }, type: "Feature" } 

• @turf/bbox-clip,
• @turf/helpers
• @turf/line-split