explode method

@override List<Point> explode()

explode the MultiPolygon into a List of Points.

Example:

MultiPolygon([
  [
    LinearRing([Coordinate(1, 2), Coordinate(3, 4), Coordinate(5, 6), Coordinate(1, 2)])
  ],
  [
    LinearRing([Coordinate(7, 8), Coordinate(9, 10), Coordinate(11, 12), Coordinate(7, 8)])
  ]
]).explode(); // [Point(1, 2), Point(3, 4), Point(5, 6), Point(1, 2), Point(7, 8), Point(9, 10), Point(11, 12), Point(7, 8)]

Implementation

@override
List<Point> explode() {
  final explodedFeatures = <Point>[];
  for (final poly in coordinates) {
    explodedFeatures.addAll(poly
        .map((ring) => ring.coordinates.map((cord) => Point(cord)).toList())
        .toList()
        .expand((i) => i)
        .toList());
  }
  return explodedFeatures;
}