@Override
    protected Geometry computePolygon() {
      var geom = worldGeometry();
      return geom instanceof LineString line ? GeoUtils.JTS_FACTORY.createPolygon(line.getCoordinates()) : geom;
    }
Alias for {@link #create(Geometry, Map, long)} with no ID set.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/SimpleFeature.java