function initialize() {
;

	var cities = L.layerGroup([]);

	var mbAttr = 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
			'<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
			'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
		mbUrl = 'https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw';

	var streets  = L.tileLayer(mbUrl, {id: 'mapbox/streets-v11', tileSize: 512, zoomOffset: -1, attribution: mbAttr});

	var map = L.map('mappabasso', {
		center: [, ],
		zoom: 9,
		layers: [streets, cities]
	});

	var baseLayers = {
		"Streets": streets
	};

	var overlays = {
		"Cities": cities
	};

	L.control.layers(baseLayers, overlays).addTo(map);
}