Antimeridian (date line)
The longitude line at about 180 degrees where geometries can wrap around the globe.
Category: CRS & Coordinates · Also known as: international date line, dateline
Definition (expanded)
Polygons that cross the antimeridian can look broken on maps or become invalid if a tool assumes coordinates are continuous. Some workflows require splitting or normalizing longitudes to handle wrap-around correctly.
Related terms
Longitude/Latitude order (lon, lat)The coordinate order used by GeoJSON and most WKT-in-EPSG:4326 workflows: X is longitude, Y is latitude.CRS (Coordinate Reference System)A definition of how coordinates map to real locations on Earth, including projection, datum, and units.Web Mercator (EPSG:3857)A common projected CRS used by web maps; it distorts area and shape but is fast and convenient for tiles.