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====== GTFS ======


A GTFS feed is composed of a series of text files collected in a ZIP file. Each file models a particular aspect of transit information: stops, routes, trips, and other schedule data. The details of each file are defined in the GTFS reference.

GTFS Spezification: https://developers.google.com/transit/gtfs/reference/

  * Routes are equivalent to "Lines" in public transportation systems. Routes are defined in the file routes.txt, and are made up of one or more Trips.
  * A Trip represents a journey taken by a vehicle through Stops. Trips are time-specific — they are defined as a sequence of StopTimes, so a single Trip represents one journey along a transit line or route.
  * A StopTime defines when a vehicle arrives at a location, how long it stays there, and when it departs.

===== Data =====


Worldwide: 
https://transitfeeds.com/feeds
https://transit.land/feed-registry/

Switzerland: https://opendata.swiss/de/dataset/timetable-2019-gtfs

Vienna: https://www.data.gv.at/katalog/dataset/ab4a73b6-1c2d-42e1-b4d9-049e04889cf0
===== Tools =====

==== OneBusAway (Java/CLI) ====

[[https://github.com/OneBusAway/onebusaway/wiki|OneBusAway]] is a library for transforming and merging GTFS data sets. Amongst others it features two handy CLIs:

[[http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/current/onebusaway-gtfs-transformer-cli.html|http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/current/onebusaway-gtfs-transformer-cli.html]]\\
[[http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/current/onebusaway-gtfs-merge-cli.html|http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/current/onebusaway-gtfs-merge-cli.html]]

Note, that the download links in the documentation are no longer updated, find the latest versions here:\\
[[http://nexus.onebusaway.org/nexus/content/groups/public/org/onebusaway/onebusaway-gtfs-transformer-cli|http://nexus.onebusaway.org/nexus/content/groups/public/org/onebusaway/onebusaway-gtfs-transformer-cli]]\\
[[http://nexus.onebusaway.org/nexus/content/groups/public/org/onebusaway/onebusaway-gtfs-merge-cli|http://nexus.onebusaway.org/nexus/content/groups/public/org/onebusaway/onebusaway-gtfs-merge-cli]]

=== Example: remove AST ===

no_ast.txt:

<file>
{"op":"remove","match":{"file":"routes.txt","route_short_name":"AST AST"}}
{"op":"remove","match":{"file":"routes.txt","route_short_name":"AST AST Maxi"}}
</file>

<code>
java -jar onebusaway-gtfs-transformer-cli-1.3.X.jar --transform=remove_ast.txt gtfs.zip gtfs_without_ast.zip
</code>

=== Example: only keep two lines from a whole dataset ===

<code>
java -jar onebusaway-gtfs-transformer-cli-1.3.34.jar --transform='{"op":"retain", "match":{"file":"routes.txt", "route_short_name":"31"}}' --transform='{"op":"retain", "match":{"file":"routes.txt", "route_short_name":"33A"}}' gtfs_vienna.zip gtfs_vienna_only31+33A.zip
</code>


==== transitfeed (Python) ====


by Google https://github.com/google/transitfeed/wiki

<code>sudo pip install transitfeed</code>




Or get the trunk from

<code>svn co https://github.com/google/transitfeed.git/trunk</code>




Comes with some command line tools

  *  feedvalidator
  *  kmlwriter


==== pygtfs ====

[[https://pygtfs.readthedocs.io/en/latest/index.html|Source]]

==== Others ====


  * R package by ROpenSciLabs https://github.com/ropenscilabs/gtfsr
  * Javascript by Conveyal https://github.com/conveyal/gtfs-data-manager
  * FME https://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_ReadersWriters/gtfs/gtfs.htm

====== Working with GTFS ======



===== On receiving a GTFS archive =====


Use transitfeeds feedvalidator.py on a zip file to obtain a detailed report on the data quality.
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