var locations = [
  {
    name: "Montreal",
    latlng: new google.maps.LatLng(45.498649, -73.492729)
  },
  {
    name: "Brossard",
    latlng: new google.maps.LatLng(45.466667, -73.450000)
  }
];

{
    "name": "Travel",
    "map": [
        {
            "name": "Montreal",
            "lat": "45.498649",
            "lng": "-73.492729"
        },
        {
            "name": "Brossard",
            "lat": "45.466667",
            "lng": "-73.450000"
        }
    ]
}

dmap = json.map;
for (i = 0; i < dmap.length; i++) {
    locations.push([dmap[i].name, dmap[i].lat, dmap[i].lng]);
}