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    <h1>Real-time Tracking Geo Latitude/Longitude on a Map</h1> <p>You are looking to update coordinate entities (lat/lon position) on a map (google maps or otherwise) in real-time as the updates occur. Here is a blog post that may get you started in the right direction: <a href="http://blog.pubnub.com/streaming-geo-coordinates-from-mongodb-to-your-iphone-app-with-pubnub-using-websocket-sdk/" rel="nofollow noreferrer">http://blog.pubnub.com/streaming-geo-coordinates-from-mongodb-to-your-iphone-app-with-pubnub-using-websocket-sdk/</a> - this uses MongoDB and Ruby rather than PHP and MySQL. However it will be easy to get things setup in this case with a real-time map in PHP and MySQL on an HTML page with the following details. And there is a video too: <a href="https://vimeo.com/60716860" rel="nofollow noreferrer">https://vimeo.com/60716860</a></p> <h2>Using MySQL to Trigger Update in Real-time</h2> <p>First you'll want to use either MySQL triggers to push the Lat/Long coords - <a href="https://stackoverflow.com/questions/13474012/invoke-pusher-when-mysql-has-changed?answertab=active#tab-top">Invoke pusher when mysql has changed</a> - this uses MySQL Triggers</p> <p>Or as an alternative you may want to use PHP directly to invoke the push signal using a PHP push SDK as follows: <a href="https://github.com/pubnub/php#php-push-api" rel="nofollow noreferrer">https://github.com/pubnub/php#php-push-api</a></p> <pre><code>$pubnub-&gt;publish(array( 'channel' =&gt; 'live_map_coords', 'message' =&gt; array( 12.3482, 8.3344 ) )); </code></pre> <h2>Receiving The Push Message in JavaScript and Showing the Updates on a Map</h2> <pre><code>&lt;script src=//pubnub.a.ssl.fastly.net/pubnub-3.4.5.min.js&gt;&lt;/script&gt; &lt;script&gt;(function(){ PUBNUB.init({ subscribe_key : 'demo' }).subscribe({ channel : 'live_map_coords', callback : function(lat_lon) { alert(lat_lon) } }); })();&lt;/script&gt; </code></pre> <p>Once you have an <code>map.html</code> page with the above code in it, you can change the <code>alert(lat_log)</code> message popup with drawing coords on a map. Here is a fully working map drawn example using <code>D3</code> JavaScript SVG rendering Framework: <a href="https://github.com/stephenlb/pubnub-mongo-pipe/blob/master/phone/map.html" rel="nofollow noreferrer">https://github.com/stephenlb/pubnub-mongo-pipe/blob/master/phone/map.html</a></p> <blockquote> <p><strong>NOTE:</strong> This is only a starting point and provides you with references on getting started to make it easy and simple, yet flexible based on the direction you will be taking your app.</p> </blockquote> <h2>Next Steps to Piece Together the Real-time Geo Map</h2> <p>You will next want to do the following to complete the process and join together all the separate components listed here.</p> <ol> <li>Modify the <code>map.html</code> page for your purposes to display always-visible dots. Note that in the video the dots are temporary beacons that display and vanish rapidly. You'll want to make them persist on the map. This is basically the <em>"Make it look the way you want it"</em> step.</li> <li>Decide how and when you want to trigger the TCP Socket Push events from PHP or MySQL directly. <strong>I'd recommend the PHP approach</strong>.</li> </ol>
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