title: How to handle multiple makers at same location in Google Maps API?
body: <p>I know there are some answers on this already, but I havne't been able to figure it out. I'm using Google Maps with Advanced Custom Fields in WordPress.</p>
  
  <p>I pull the locations from the ACF and this then generates the maps.</p>
  
  <p>However, the some of the locations are the same; so the infowindow only shows one title and the others are totally hidden.</p>
  
  <p>I would be fine if the markers are slightly spreak apart.</p>
  
  <p>I would also be okay if the infowindow could include all of the titles of all of the posts that are in the same location.</p>
  
  <p>Can anyone help?</p>
  
  <p>This is the current code:</p>
  
  <pre><code>&lt;script src="http://www.google.com/jsapi?key=ABQIAAAArX_FiOGh9BVSA-VaKWxf3BTjV82plXfzb-h9w4F1dGZTQrT8wxSgksN4vLUdfoCX3U-gz7r_GPkm2A" type="text/javascript"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;
  google.load("jquery", "1.7.1");
  google.load("jqueryui", "1.8.16");
  &lt;/script&gt;
  &lt;script src="https://maps.googleapis.com/maps/api/js?v=3.exp&amp;sensor=false"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;
  (function($) {
  
  /*
  *  render_map
  *
  *  This function will render a Google Map onto the selected jQuery element
  *
  *  @type    function
  *  @date    8/11/2013
  *  @since   4.3.0
  *
  *  @param   $el (jQuery element)
  *  @return  n/a
  */
  
  function render_map( $el ) {
  
  // var
  var $markers = $el.find('.marker');
  
  // vars
  var args = {
      zoom        : 16,
      center      : new google.maps.LatLng(0, 0),
      mapTypeId   : google.maps.MapTypeId.ROADMAP
  };
  
  // create map
  var map = new google.maps.Map( $el[0], args);
  
  // add a markers reference
  map.markers = [];
  
  // add markers
  $markers.each(function(){
  
      add_marker( $(this), map );
  
  });
  
  // center map
  center_map( map );
  
  }
  
  // create info window outside of each - then tell that singular infowindow to swap content based on click
  var infowindow = new google.maps.InfoWindow({
  content     : ''
  });
  
  /*
  *  add_marker
  *
  *  This function will add a marker to the selected Google Map
  *
  *  @type    function
  *  @date    8/11/2013
  *  @since   4.3.0
  *
  *  @param   $marker (jQuery element)
  *  @param   map (Google Map object)
  *  @return  n/a
  */
  
  function add_marker( $marker, map ) {
  
  // var
  var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );
  
  // create marker
  var marker = new google.maps.Marker({
      position    : latlng,
      map         : map
  });
  
  // add to array
  map.markers.push( marker );
  
  // if marker contains HTML, add it to an infoWindow
  if( $marker.html() )
  {
  
      // show info window when marker is clicked &amp; close other markers
      google.maps.event.addListener(marker, 'click', function() {
          //swap content of that singular infowindow
                  infowindow.setContent($marker.html());
                  infowindow.open(map, marker);
      });
  
      // close info window when map is clicked
           google.maps.event.addListener(map, 'click', function(event) {
              if (infowindow) {
                  infowindow.close(); }
              });
  
  }
  
  }
  
  /*
  *  center_map
  *
  *  This function will center the map, showing all markers attached to this map
  *
  *  @type    function
  *  @date    8/11/2013
  *  @since   4.3.0
  *
  *  @param   map (Google Map object)
  *  @return  n/a
  */
  
  function center_map( map ) {
  
  // vars
  var bounds = new google.maps.LatLngBounds();
  
  // loop through all markers and create bounds
  $.each( map.markers, function( i, marker ){
  
      var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );
  
      bounds.extend( latlng );
  
  });
  
  // only 1 marker?
  if( map.markers.length == 1 )
  {
      // set center of map
      map.setCenter( bounds.getCenter() );
      map.setZoom( 16 );
  }
  else
  {
      // fit to bounds
      map.fitBounds( bounds );
  }
  
  }
  
  
  
  /*
  *  document ready
  *
  *  This function will render each map when the document is ready (page has loaded)
  *
  *  @type    function
  *  @date    8/11/2013
  *  @since   5.0.0
  *
  *  @param   n/a
  *  @return  n/a
  */
  
  $(document).ready(function(){
  
  $('.acf-map').each(function(){
  
      render_map( $(this) );
  
  });
  
      });
  
      })(jQuery);
      &lt;/script&gt;
  </code></pre>