BuildingsController.js

buildingMarkers: function () {
  var results = Ember.ArrayProxy.create({ content: Ember.A([]) }),
    buildings = this.get('content');
    mapController = this.get('map'),
    marker,
    bin,
    latlng,
    building;

  for (building in buildings) {
    building = buildings[building];
    
    if (building && building.constructor === Ember.Object) {
      bin = building.get('bin');
      latlng = building.get('latlng');

      marker = new google.maps.Marker({
        position: new google.maps.LatLng(latlng.lat, latlng.lng),
        map: gmap,
        animation: google.maps.Animation.DROP,
        title: bin,
        bin: bin,
        source: building.get('source'),
      });
      
      this.bindMarkerClick(marker, mapController);    
      results.pushObject(marker);
    }
  }
  
  return results;
}.property('content.@each'),