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How to show multiple Google Maps on one page?

  • I am using the Google Maps field. I have the required CSS & JS code from this page http://www.advancedcustomfields.com/resources/google-map/ and the PHP to render a single marker onto the map. I want to show several different maps on one page (store locations in different regions – one marker per map) and have set up the required fields in backend – all is perfect. My first map shows correctly on frontend, but subsequent maps don’t appear.

    Other threads I’ve read about this are using accordian or Bootstrap elements to show/hide….I just want to simply show multiple maps on one page.

    Could anyone please advise?

  • Hi @kitty

    Could you provide a link to the page so I can take a look first hand?

  • This reply has been marked as private.
  • Hm okay.

    You have a few problems here.. The biggest are that you have a few 404 errors you should look into.

    
    Failed to load resource: the server responded with a status of 404 (Not Found)
    http://mcw.lamp.wiredgroup.com/wp-content/themes/mcw/js/lib/modernizr-2.7.1.min.js?ver=2.7.1 
    Failed to load resource: the server responded with a status of 404 (Not Found)
    http://mcw.lamp.wiredgroup.com/wp-content/themes/mcw/js/scripts.js?ver=1.0.0 
    Failed to load resource: the server responded with a status of 404 (Not Found)
    http://mcw.lamp.wiredgroup.com/contact/js/bootstrap.min.js 
    Failed to load resource: the server responded with a status of 404 (Not Found)
    

    Looking at the sourcecode you’re not outputting the acf-map divs for the other locations at all so that’s probably the reason why you’re not seeing any maps.

    Could you post the code you have for the entire section?

  • Oh dear, thanks @jonathan I will get those 404s sorted out.

    The CSS/JS is taken straight from the example:

    <style type="text/css">
    
    .acf-map {
    	width: 100%;
    	height: 200px;
    	border: #ccc solid 1px;
    	margin: 20px 0;
    }
    
    </style>
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
    <script type="text/javascript">
    (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 );
    
    }
    
    /*
    *  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() )
    	{
    		// create info window
    		var infowindow = new google.maps.InfoWindow({
    			content		: $marker.html()
    		});
    
    		// show info window when marker is clicked
    		google.maps.event.addListener(marker, 'click', function() {
    
    			infowindow.open( map, marker );
    
    		});
    	}
    
    }
    
    /*
    *  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);
    </script>

    and the code is (showing first two, they are all identical code just with replaced field names):

    <div class="col-md-4" id="christchurch">
                <h3>Christchurch</h3>
    			<?php 
                    $location = get_field('christchurch-map');
        
                    if( !empty($location) ):
                ?>
                <div class="acf-map">
                    <div class="marker" data-lat="<?php echo $location['lat']; ?>" data-lng="<?php echo $location['lng']; ?>"></div>
                </div>
                <?php endif; ?>
                <?php the_field('christchurch'); ?>
            </div>
            <div class="col-md-4" id="timaru">
                <h3>Timaru</h3>
    			<?php 
                    $location = get_field('timaru-map');
        
                    if( !empty($location) ):
                ?>
                <div class="acf-map">
                    <div class="marker" data-lat="<?php echo $location['lat']; ?>" data-lng="<?php echo $location['lng']; ?>"></div>
                </div>
                <?php endif; ?>
                <?php the_field('timaru'); ?>
            </div>
  • Mkay. So some dumb questions.. Are you sure you have the correct field names AND that you have actually set locations for each map in the edit screen?

  • Totally valid questions! Because you’re absolutely right, the issue was just mismatching field names with underscores instead of dashes. Duh…. I was too caught up in looking for some complex problem and totally overlooked this. Typical! 🙂 Well I really appreciate your help to pinpoint my silly overlook 🙂 Thanks very much @jonathan

  • No problem! Glad I could help 🙂

    Sometimes we just need someone to poke at our code to make us realize what we need to do..

    Let me know if you need any further assistance.

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