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| author | isabelle-dr | 2022-03-22 19:33:40 -0400 |
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| committer | isabelle-dr | 2022-03-22 19:33:40 -0400 |
| commit | 24e89c97cbbdd89348b1f02497a129ac8ac0a14f (patch) | |
| tree | ac8432b0731525e889b6dfefa1401ce277af6893 /.idea/gtfs-book/ch-01-introduction.md | |
| parent | ab1b75da67be3e101e40e0ae3052d73c714b8ea3 (diff) | |
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diff --git a/.idea/gtfs-book/ch-01-introduction.md b/.idea/gtfs-book/ch-01-introduction.md deleted file mode 100644 index 3b3765c..0000000 --- a/.idea/gtfs-book/ch-01-introduction.md +++ /dev/null @@ -1,45 +0,0 @@ -## 1. Introduction to GTFS - -GTFS (General Transit Feed Specification) is a data standard developed -by Google used to describe a public transportation system. Its primary -purpose was to enable public transit agencies to upload their schedules -to Google Transit so that users of Google Maps could easily figure out -which bus, train, ferry or otherwise to catch. - -> **A GTFS feed is a ZIP file that contains a series of CSV files that -list routes, stops and trips in a public transportation system.** - -This book examines GTFS in detail, including which data from a public -transportation system can be represented, how to extract data, and -explores some more advanced techniques for optimizing and querying data. - -The official GTFS specification has been referenced a number of times in -this book. It is strongly recommended you are familiar with it. You can -view at the following URL: - -<https://developers.google.com/transit/gtfs/reference> - -### Structure of a GTFS Feed - -A GTFS feed is a series of CSV files, which means that it is trivial to -include additional files in a feed. Additionally, files required as part -of the specification can also include additional columns. For this -reason, feeds from different agencies generally include different levels -of detail. - -***Note:** The files in a GTFS feed are CSV files, but use a file -extension of `.txt`.* - -A GTFS feed can be described as follows: - -> **A GTFS feed has one or more routes. Each route (`routes.txt`) has one or -more trips (`trips.txt`). Each trip visits a series of stops (`stops.txt`) -at specified times (`stop_times.txt`). Trips and stop times only contain -time of day information; the calendar is used to determine on which days -a given trip runs (`calendar.txt` and `calendar_dates.txt`).** - -The following chapters cover the main files that are included in all -GTFS feeds. For each file, the main columns are covered, as well as -optional columns that can be included. This book also covers some of the -unofficial columns that some agencies choose to include. - |