import 'package:flutter/material.dart'; import 'package:flutter_map/flutter_map.dart'; class BaseLayer extends StatelessWidget { const BaseLayer({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return TileLayerWidget( options: TileLayerOptions( backgroundColor: Colors.transparent, urlTemplate: 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', subdomains: ['a', 'b', 'c'], ), ); } }