How to link to Google Maps

<c:if test="${not empty show.locationName }">
<div>
    <span class="glyphicon glyphicon-map-marker" aria-hidden="true" title="Location"></span> <a href='http://maps.google.com/maps?q=${show.locationLatitude},${show.locationLongitude }&ll=${show.locationLatitude},${show.locationLongitude }&z=17' title='View location in Google Maps'><c:out value="${show.locationName }"></c:out></a>
</div>
</c:if>