<p>Plots "things" on a web map. Needs an internet connection.</p>
<p>To use this node you must also create a <code>websocket out</code> node
configured to point at <b>{httpRoot}/ws/worldmap</b> .</p>
<p>The minimum <code>msg.payload</code> sent to the websocket must contain <code>name</code>, <code>lat</code> and <code>lon</code> properties, e.g.</p>
<pre>{name:"Joe", lat:51, lon:-1.05}</pre>
<p><code>name</code> must be a unique identifier.</p>
<p>Optional properties include</p>
<ul>
<li><code>layer</code> : specify a layer on the map to add marker to.</li>
<li><code>speed</code> : combined with bearing, draws a vector.</li>
<li><code>bearing</code> : combined with speed, draws a vector.</li>
<li><code>accuracy</code> : combined with bearing, draws a polygon of possible direction.</li>