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| Re: Canarsie Tunnel Single Track Operation (1500609) | |||
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Re: Canarsie Tunnel Single Track Operation |
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Posted by Stephen Bauman on Sun Jan 20 23:39:05 2019, in response to Re: Canarsie Tunnel Single Track Operation, posted by Abba on Sun Jan 20 22:33:52 2019. The raw data is freely available from the MTA. Go to the MTA website and click on the Developer Resources link down on the left hand column. A license from the MTA is required to access the real time data. Archived data real time data can be retrieved without a license from the data feed page for division B. Alas, the L train is not included in that archive. There is a private archive that you can find, if you look through the MTA Developers Google Group forum. That's the one I used for my after the fact L train analysis.The real time data uses the GTFS-RT format. The data is highly compressed. It requires a fairly strong programming background to retrieve the underlying data in a usable form. The protobuf program will take the feed and translate it to a pseudo XML file. I wrote a program that corrects the XML syntax from the protobuf output. My program then translates the XML files to a series of csv files and then imports these csv files into a postgresql database. If you feel you are up to the challenge, I'd be happy to upload the protobuf output files for my L train single track analysis. That way you can verify that I did not fudge any of the data. |
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