README.md

Flutter Map Heatmap plugin

A Simple heatmap plugin written for for flutter_map package.

example

A full example can be found under the example project.

Usage

Add flutter_map and flutter_map_heatmap to your pubspec:

dependencies:
  flutter_map: ^6.0.0
  flutter_map_heatmap: any # or the latest version on Pub
  latlong2: ^0.9.0

Flutter heatmaps is implemented as a tile provider.

Add it in your FlutterMap and configure it using HeatMapOptions.

  Widget build(BuildContext context) {
    return FlutterMap(
      options: new MapOptions(initialCenter: new LatLng(57.8827, -6.0400), initialZoom: 8.0),
      children: [
        TileLayer(
            urlTemplate: "https://tile.openstreetmap.org/{z}/{x}/{y}.png"),
        if (data.isNotEmpty) HeatMapLayer(
          heatMapDataSource: InMemoryHeatMapDataSource(data: data),
          heatMapOptions: HeatMapOptions(gradient: this.gradients[this.index],
          minOpacity: 0.1),
          reset: _rebuildStream.stream,
        )
      ],
    );
  }

See the full example

InMemoryHeatMapDataSource is provided out of the box but its easy to implement your own datasource provider by implementing HeatMapDataSource

TODO

• complete GriddedHeatMapDataSource for gridding the data
• improve heatmaps at lower zoom levels by scaling the radius used during painting.