<story><title>Indian Railways, live on Google Maps</title><url>http://railradar.trainenquiry.com/</url></story><parent_chain><item><author>yogrish</author><text>Very nice app esp. in context of India where train timings are highly unpredictable.How are they getting real time data - GPS fitted or Indian rail opened APIs?&lt;p&gt;Good that they mentioned why it is not exact real time ...&quot;For security and regulatory reasons, the information published on RailRadar is delayed for 5 or more minutes.&quot;&lt;p&gt;edit: Rephrased.</text></item></parent_chain><comment><author>jagira</author><text>Indian Railways has numerous monitoring stations. (mainly at railway stations) These monitoring stations update train&apos;s location when trains pass &apos;em.&lt;p&gt;In between such points, IR may know train&apos;s realtime location, but it is not made public.&lt;p&gt;&lt;i&gt;Update&lt;/i&gt;&lt;p&gt;It is mentioned on the site that there are 6000 monitoring stations. Which means that, on average, there is a monitoring station every 11 kms (66k Km/ 6000). Considering an average speed of 80kmph, the location shown on the app can at max be 8.25 minutes old.</text></comment>
<story><title>Indian Railways, live on Google Maps</title><url>http://railradar.trainenquiry.com/</url></story><parent_chain><item><author>yogrish</author><text>Very nice app esp. in context of India where train timings are highly unpredictable.How are they getting real time data - GPS fitted or Indian rail opened APIs?&lt;p&gt;Good that they mentioned why it is not exact real time ...&quot;For security and regulatory reasons, the information published on RailRadar is delayed for 5 or more minutes.&quot;&lt;p&gt;edit: Rephrased.</text></item></parent_chain><comment><author>kingsley_20</author><text>Indian railways employs a number of methods. The most primitive fallback is the one where the station master updates the system whenever a train passes the station, whether or not it stops there.</text></comment>