L.layerJSON({ url: 'http://overpass-api.de/api/interpreter?data=[out:json];node({lat1},{lon1},{lat2},{lon2})[amenity=bar];out;', propertyItems: 'elements', propertyTitle: 'tags.name', propertyLoc: ['lat','lon'], buildPopup: function(data, marker) { return data.tags.name || null; } }).addTo(map);