// Initialisation d'une carte avec plusieurs fonds de plans
			mapboxUrl = 'https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=votre_clef';
			mapboxAttribution = 'Fond de carte &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' + '<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' + 'via © <a href="https://www.mapbox.com/">Mapbox</a>'

			var light = L.tileLayer(mapboxUrl, {id: 'mapbox/light-v10', attribution: mapboxAttribution}),
				streets = L.tileLayer(mapboxUrl, {id: 'mapbox/streets-v11', attribution: mapboxAttribution}),
				sat = L.tileLayer(mapboxUrl, {id: 'mapbox/satellite-v9', attribution: mapboxAttribution});

			var map = L.map('map', {
				center: [45.52,-73.63],
				zoom: 13,
				layers: [sat, streets, light]
			});