This algorithm splits a line into multiple geodesic segments, whenever the line crosses the antimeridian (±180 degrees longitude). Splitting at the antimeridian helps the visual display of the lines in some projections. The returned geometry will always be a multi-part geometry.
Whenever line segments in the input geometry cross the antimeridian, they will be split into two segments, with the latitude of the breakpoint being determined using a geodesic line connecting the points either side of this segment. The current project ellipsoid setting will be used when calculating this breakpoint.
If the input geometry contains M or Z values, these will be linearly interpolated for the new vertices created at the antimeridian.
Supports in-place edit mode also.
This feature was developed by Nyall Dawson (North Road)