map.js

function initMap() {
        var startPlace = {lat: -12.9648489, lng: -38.4501421};
        var infoWindow = new google.maps.InfoWindow;
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 11,
          center: startPlace
        });

        var positions = [],
            pos;

        var geocoder = new google.maps.Geocoder();

        $.ajax({
          url: "address.json",
          dataType: "json",
          async: false,
          success: function(data){
            $.each(data, function( k, v ) {
             getGeo(v);
            });
          }
        });

        function getGeo(v){
          geocoder.geocode( { 'address': v.address }, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
              obj = {
                lat: results[0].geometry.location.lat(),
                lng: results[0].geometry.location.lng(),
                marker:  v
              };
              renderMap(obj);
            }
          });
        }

        function renderMap(obj){
          var myLatlng = new google.maps.LatLng(obj.lat,obj.lng);
          var marker = new google.maps.Marker({
              map: map,
              position: myLatlng
          });

          google.maps.event.addListener(marker, 'click', function() {
            infoWindow.setContent("<h2>"+obj.marker.title+"</h2><p>"+obj.marker.content+"</p>");
            infoWindow.open(map,marker);
          });
        }
      }