• JavaScript
  • HTML

 * An event listener is added to listen to tap events on the map.
 * Clicking on the map displays an alert box containing the latitude and longitude
 * of the location pressed.
 * @param  {H.Map} map      A HERE Map instance within the application
function setUpClickListener(map) {
  // Attach an event listener to map display
  // obtain the coordinates and display in an alert box.
  map.addEventListener('tap', function (evt) {
    var coord = map.screenToGeo(evt.currentPointer.viewportX,
    logEvent('Clicked at ' + Math.abs(coord.lat.toFixed(4)) +
        ((coord.lat > 0) ? 'N' : 'S') +
        ' ' + Math.abs(coord.lng.toFixed(4)) +
         ((coord.lng > 0) ? 'E' : 'W'));

 * Boilerplate map initialization code starts below:

//Step 1: initialize communication with the platform
// In your own code, replace variable window.apikey with your own apikey
var platform = new H.service.Platform({
  apikey: window.apikey
var defaultLayers = platform.createDefaultLayers();

//Step 2: initialize a map
var map = new H.Map(document.getElementById('map'),
  center: {lat: 30.94625288456589, lng: -54.10861860580418},
  zoom: 1,
  pixelRatio: window.devicePixelRatio || 1
// add a resize listener to make sure that the map occupies the whole container
window.addEventListener('resize', () => map.getViewPort().resize());

//Step 3: make the map interactive
// MapEvents enables the event system
// Behavior implements default interactions for pan/zoom (also on mobile touch environments)
var behavior = new H.mapevents.Behavior(new H.mapevents.MapEvents(map));

// Step 4: create custom logging facilities
var logContainer = document.createElement('ul');
logContainer.className ='log';
logContainer.innerHTML = '
  • Try clicking on the map
  • '; map.getElement().appendChild(logContainer); // Helper for logging events function logEvent(str) { var entry = document.createElement('li'); entry.className = 'log-entry'; entry.textContent = str; logContainer.insertBefore(entry, logContainer.firstChild); } setUpClickListener(map);
    <!DOCTYPE html>
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=yes">
        <meta http-equiv="Content-type" content="text/html;charset=UTF-8">
        <title>Calculating a Location from a Mouse Click</title>
        <link rel="stylesheet" type="text/css" href="https://js.api.here.com/v3/3.1/mapsjs-ui.css" />
        <link rel="stylesheet" type="text/css" href="demo.css" />
        <link rel="stylesheet" type="text/css" href="styles.css" />
        <link rel="stylesheet" type="text/css" href="../template.css" />
        <script type="text/javascript" src='../test-credentials.js'></script>
        <script type="text/javascript" src="https://js.api.here.com/v3/3.1/mapsjs-core.js"></script>
        <script type="text/javascript" src="https://js.api.here.com/v3/3.1/mapsjs-service.js"></script>
        <script type="text/javascript" src="https://js.api.here.com/v3/3.1/mapsjs-ui.js"></script>
        <script type="text/javascript" src="https://js.api.here.com/v3/3.1/mapsjs-mapevents.js"></script>
        <style type="text/css">
          .log {
            position: absolute;
            top: 5px;
            left: 5px;
            height: 150px;
            width: 250px;
            overflow: scroll;
            background: white;
            margin: 0;
            padding: 0;
            list-style: none;
            font-size: 12px;
          .log-entry {
            padding: 5px;
            border-bottom: 1px solid #d0d9e9;
          .log-entry:nth-child(odd) {
              background-color: #e1e7f1;
      <script type="text/javascript" src='../js-examples-rendering-helpers/iframe-height.js'></script></head>
      <body id="markers-on-the-map">
        <div class="page-header">
            <h1>Calculating a Location from a Mouse Click</h1>
            <p>Obtain the latitude and longitude of a location within the map</p>
        <p>This example displays a map of the world. Clicking on the map displays an alert box containing the latitude and longitude of the location pressed.</p>
        <div id="map"></div>
        <p>The <code>tap</code> event holds the x and y screen coordinates of the location clicked. 
          These are converted to a latitude and longitude using the <code>map.screenToGeo()</code> method.</p>
        <script type="text/javascript" src='demo.js'></script>