• JavaScript
  • HTML
                  
                  
    
/**
 * Adds a circle over New Delhi with a radius of 1000 metres onto the map
 *
 * @param  {H.Map} map      A HERE Map instance within the application
 */
function addCircleToMap(map){
  map.addObject(new H.map.Circle(
    // The central point of the circle
    {lat:28.6071, lng:77.2127},
    // The radius of the circle in meters
    1000,
    {
      style: {
        strokeColor: 'rgba(55, 85, 170, 0.6)', // Color of the perimeter
        lineWidth: 2,
        fillColor: 'rgba(0, 128, 0, 0.7)'  // Color of the circle
      }
    }
  ));
}





/**
 * Boilerplate map initialization code starts below:
 */

//Step 1: initialize communication with the platform
var platform = new H.service.Platform({
  app_id: window.app_id,
  app_code: window.app_code,
  useHTTPS: true
});
var pixelRatio = window.devicePixelRatio || 1;
var defaultLayers = platform.createDefaultLayers({
  tileSize: pixelRatio === 1 ? 256 : 512,
  ppi: pixelRatio === 1 ? undefined : 320
});

//Step 2: initialize a map - this map is centered over New Delhi
var map = new H.Map(document.getElementById('map'),
  defaultLayers.normal.map,{
  center: {lat:28.6071, lng:77.2127},
  zoom: 13,
  pixelRatio: pixelRatio
});
// 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));

// Create the default UI components
var ui = H.ui.UI.createDefault(map, defaultLayers);

// Now use the map as required...
addCircleToMap(map);                  
                
                  
                  
<!DOCTYPE html>
<html>
  <head>
    <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>Circle on the Map</title>
    <link rel="stylesheet" type="text/css" href="https://js.api.here.com/v3/3.0/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='../js-examples-rendering-helpers/iframe-height.js'></script> 
    <script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-core.js"></script>
    <script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-service.js"></script>
    <script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-ui.js"></script>
    <script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-mapevents.js"></script>
  </head>
  <body id="markers-on-the-map">
    <div class="page-header">
        <h1>Circle on the Map</h1>
        <p>Display a map highlighting a circular region</p>
    </div>
    <p>This example shows a circle with a radius of 1000 meters centered over a location in <b>New Delhi</b> <i>(28.6071°N, 77.2127°E)</i> and displayed on a moveable map.</p>
    <div id="map"></div>
    <h3>Code</h3>
    <p>A circle is created using the <code>H.map.Circle</code> class, 
      passing in the center point and radius. The look-and-feel of the circle 
      can be altered by adding the <code>style</code> parameter
      </p>
    <script type="text/javascript" src='demo.js'></script>
  </body>
</html>