Polygon Annotations

Polygons are way to highlight an area on the map.

Basic Usage

@override
Widget build(BuildContext context) {
  return MapLibreMap(
    options: MapOptions(zoom: 7, center: Position(9.17, 47.68)),
    layers: [
      PolygonAnnotationLayer(
        polygons: <Polygon>[
          Polygon(
            coordinates: [
              [
                Position(9.17, 47.68),
                Position(9.5, 48),
                Position(9, 48),
              ],
            ],
          ),
        ],
        color: Colors.lightBlueAccent.withOpacity(0.6),
        outlineColor: Colors.blue,
      ),
    ],
  );
}

That's it! You can add multiple PolygonAnnotationLayers with different properties.

Update

To add, remove or alter annotation layers, just use setState() like you'd do with Flutter widgets.

Check out the example app if you want to see how things come together.

Style & Layout

The PolygonAnnotationLayer has a lot of parameters you can use for styling.

If you need more powerful customizations for your Polygons, you can use the more low level FillLayer.