PowerGeoJSONPolygons class

A utility class for loading and displaying polygons on a map from various sources.

The PowerGeoJSONPolygons class provides static methods for loading polygon data from network sources, assets, files, memory, or directly from a string in GeoJSON format. It also allows customizing polygon rendering through a builder function or polygon properties.

Example usage:

// Load polygons from a network source
PowerGeoJSONPolygons.network(
  'https://example.com/polygon_data.geojson',
  builder: (coordinates, properties) {
    // Customize polygon rendering
    return Polygon(
      points: coordinates[0].map((point) => LatLng(point[1], point[0])).toList(),
      // Add more polygon properties as needed
    );
  },
  mapController: myMapController,
)

// Load polygons from an asset file
PowerGeoJSONPolygons.asset(
  'assets/polygon_data.geojson',
  polygonProperties: PolygonProperties(
    fillColor: Colors.blue,
    strokeColor: Colors.red,
  ),
)

// Load polygons from memory data
PowerGeoJSONPolygons.memory(
  myGeojsonData,
  polygonCulling: true,
)

// Load polygons from a string in GeoJSON format
PowerGeoJSONPolygons.string(
  '{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[...]]}}',
  mapController: myMapController,
)