EON Maps

Real-time location tracking powered by PubNub and MapBox.

Examples

• One Marker
• Multiple Markers + Follow Marker
• Custom Marker Image + Rotation
• Bus Tracking

Quickstart

<script type="text/javascript" src="http://pubnub.github.io/eon/lib/eon-map.js"></script>
<link type="text/css" rel="stylesheet" href="http://pubnub.github.io/eon/lib/eon.css" />
<div id='map'></div>
<script type="text/javascript">
eon.map({
  id: 'map',
  mb_token: 'mapbox api token',
  mb_id: 'mapbox map id',
  subscribe_key: 'demo',
  channel: 'my map channel'
});
</script>

Init

Parameter	Value	Default
id	The ID of the element where the map will be rendered.	undefined
mb_token	Mapbox API Token.	undefined
mb_id	Mapbox Map ID.	undefined
transform	Method for changing the payload format of your stream. See example	function(m){}
history	Use PubNub history call to retrieve last message. This will display points at their last known location. Requires PubNub storage to be enabled.	false
pubnub	An instance of the PUBNUB javascript global. This is required when using your own keys. See the subscribe_key example.	false
connect	A function to call when PubNub makes a connection. See PubNub subscribe	function(){}
marker	A custom Mapbox marker object. Use this to change the marker icon, tooltip, etc.	L.marker
rotate	Add bearing to markers in options.angle. This won't have any effect unless you're using a rotated marker type.	false

Simple Example

Call eon.map({}). Check out the table of options above for more information.

var channel = 'pubnub-mapbox';

eon.map({
  id: 'map',
  mb_token: 'pk.eyJ1IjoiaWFuamVubmluZ3MiLCJhIjoiZExwb0p5WSJ9.XLi48h-NOyJOCJuu1-h-Jg',
  mb_id: 'ianjennings.l896mh2e',
  channel: channel,
  connect: connect
});

Lat/Long Values

eon.map expects an array of objects to be published on the same channel it's subscribed to. More on publishing in the next section.

For example, below you can find a list of all the Torchy's Tacos in Austin, TX.

var torchys = [
  { latlng: [30.370375, -97.756138] },
  { latlng: [30.323118, -97.739144] },
  { latlng: [30.302816, -97.699490] },
  { latlng: [30.293479, -97.742405] },
  { latlng: [30.250337, -97.754593] },
  { latlng: [30.236689, -97.762730] }
];

Publishing Messages

The function below is called connect and fires when the pubnub_mapbox library is ready.

This function uses the included PubNub library to pubnub.publish() packets to the pubnub.subscribe() call waiting inside the Mapbox framework.

Notice how the subscribe_key and channel matches.

function connect() {

var point = {
  latlng: [37.370375, -97.756138]
};

var pn = PUBNUB.init({
  publish_key: 'demo'
});

setInterval(function(){

  var new_point = JSON.parse(JSON.stringify(point));

  new_point.latlng = [
    new_point.latlng[0] + (getNonZeroRandomNumber() * 0.1),
    new_point.latlng[1] + (getNonZeroRandomNumber() * 0.2)
  ];

  pn.publish({
    channel: channel,
    message: [new_point] // even a single point should be an array
  });

}, 500);

};

You probably want to publish data from the back-end instead. Check out our docs for more info:

http://www.pubnub.com/documentation/

Following a Point

You can tell the map to follow a point to it's new location whenever data is received by supplying a message callback.

var map = eon.map({
  id: 'map',
  mb_id: 'ianjennings.l896mh2e',
  //...
  message: function (data) {
    map.setView(data[3].latlng, 13);
  }
});

Marker Customization

You can supply a custom Mapbox marker object with custom tooltips by extening the L.marker object provided by mapbox. Learn more about custom markers here.

<div id='map'></div>
<script>
  L.RotatedMarker = L.Marker.extend({
    options: { angle: 0 },
    _setPos: function(pos) {
      L.Marker.prototype._setPos.call(this, pos);
      if (L.DomUtil.TRANSFORM) {
        // use the CSS transform rule if available
        this._icon.style[L.DomUtil.TRANSFORM] += ' rotate(' + this.options.angle + 'deg)';
      } else if (L.Browser.ie) {
        // fallback for IE6, IE7, IE8
        var rad = this.options.angle * L.LatLng.DEG_TO_RAD,
        costheta = Math.cos(rad),
        sintheta = Math.sin(rad);
        this._icon.style.filter += ' progid:DXImageTransform.Microsoft.Matrix(sizingMethod=\'auto expand\', M11=' +
          costheta + ', M12=' + (-sintheta) + ', M21=' + sintheta + ', M22=' + costheta + ')';
      }
    }
  });

  var map = eon.map({
    id: 'map',
    mb_id: 'ianjennings.lec77m70',
    mb_token: 'pk.eyJ1IjoiaWFuamVubmluZ3MiLCJhIjoiZExwb0p5WSJ9.XLi48h-NOyJOCJuu1-h-Jg',
    channel: 'rutgers-bus-data',
    rotate: true,
    history: true,
    marker: function (latlng, data) {

      var marker = new L.RotatedMarker(latlng, {
        icon: L.icon({
          iconUrl: 'http://i.imgur.com/2fmFQfN.png',
          iconSize: [9, 32]
        })
      });

      marker.bindPopup('Route ' + data.routeTag.toUpperCase());

      return marker;

    }
  });
</script>

Configure using your own PubNub API Keys

Using your own API Key with Eon Maps

You can set the pubnub init parameter when using Eon Maps. This allows you to configure PubNub client connections with extra security options such a auth_key and your cipher_key. You should also set secure: true and ssl: true as well.

<div id="map"></div>
<script>
  var pubnub  = PUBNUB({ subscribe_key : 'YOUR_SUBKEY_HERE', ssl : true });
  var channel = 'my-map';
  eon.map({
    pubnub   : pubnub,  // < - - - here < - - - //
    channel  : channel,
    id       : 'map',
    mb_id    : 'mapbox.streets',
    mb_token : 'pk.ey31IjoiaWRtc3giLCJhIjoiZZ1zMGI2ZjBlNTMxZjk5YTEwNjM5WNJlOWI4MmJiZGIifQ.U1jMQo2QVeuUtt85oD7hkQ'
  });
</script>

Kitchen Sink

Check out the bus.html and flight.html for full featured examples.

Customizing with Mapbox

The MapBox map object is returned by eon.mapbox and can be customized using the Mapbox API. Also see the Mapbox examples page.

Also note that you can customize your map using Mapbox map editor. You can change the map background style, add static markers, etc. Visit Mapbox for your own API key.

Distributed Systems

The EON library compiles all messages at designated intervals. This means you can publish from multiple sources into one map. For example, you can map the individual locations of 3 phones by supplying the same channel to your PubNub publish requests. The flight example works like this; not every flight is updated on every subscribe call.