rker per location, and put into markers array.
          var marker = new google.maps.Marker({
            position: position,
            title: title,
            animation: google.maps.Animation.DROP,
            icon: defaultIcon,
            id: i
          });
          // Push the marker to our array of markers.
          markers.push(marker);
          // Create an onclick event to open the large infowindow at each marker.
          marker.addListener('click', function() {
            populateInfoWi