A plugin for flutter_map that enables the use of vector tiles with slippy maps and Flutter.
Loads vector tiles from a source such as Mapbox or Stadia Maps, and renders them as a layer on a flutter_map.
Tile rendering can be vector, mixed, or raster. Mixed mode is default, since that provides an optimal trade-off between sharp visuals when idle, and smooth animation when zooming with a pinch gesture.
Usage
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: SafeArea(
child: Column(children: [
Flexible(
child: FlutterMap(
options: MapOptions(
center: LatLng(49.246292, -123.116226),
zoom: 10,
maxZoom: 15,
interactiveFlags: InteractiveFlag.doubleTapZoom |
InteractiveFlag.drag |
InteractiveFlag.pinchZoom |
InteractiveFlag.pinchMove,
plugins: [VectorMapTilesPlugin()]),
layers: <LayerOptions>[
// normally you would see TileLayerOptions which provides raster tiles
// instead this vector tile layer replaces the standard tile layer
VectorTileLayerOptions(
theme: _mapTheme(context),
tileProvider: MemoryCacheVectorTileProvider(
delegate: NetworkVectorTileProvider(
urlTemplate: _urlTemplate(),
// this is the maximum zoom of the provider, not the
// maximum of the map. vector tiles are rendered
// to larger sizes to support higher zoom levels
maximumZoom: 14),
maxSizeBytes: 1024 * 1024 * 2)),
],
))
])));
}
_mapTheme(BuildContext context) {
// maps are rendered using themes
// to provide a dark theme do something like this:
// if (MediaQuery.of(context).platformBrightness == Brightness.dark) return myDarkTheme();
return ProvidedThemes.lightTheme();
}
String _urlTemplate() {
// Stadia Maps source https://docs.stadiamaps.com/vector/
return 'https://tiles.stadiamaps.com/data/openmaptiles/{z}/{x}/{y}.pbf?api_key=$apiKey';
// Mapbox source https://docs.mapbox.com/api/maps/vector-tiles/#example-request-retrieve-vector-tiles
// return 'https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/{z}/{x}/{y}.mvt?access_token=$apiKey',
}
}
See the example for details.
Status
This plugin is fairly new and has not yet been broadly used. It's feature complete enough to be a v1, but does
have performance issues on larger screens such as on a tablet or very old devices.
