This application intermittently polls bus data from a service over HTTP and displays info about current bus positions and stops on a map.

Database setup

You need to install sqlite3 and initialize gtfs.db with recent GTFS data before running. For CET, you can go to this URL to download an archive of GTFS data represented in CSV format. You can then import the CSV files into an SQLite database using the .import command, like this:

$ mkdir gtfs
$ curl https://openmobilitydata-data.s3-us-west-1.amazonaws.com/public/feeds/cascades-east-transit/440/20200519/gtfs.zip -o gtfs/gtfs.zip
$ cd gtfs
$ unzip gtfs.zip
$ cd ..
$ sqlite3 gtfs.db
> .mode csv
> .import gtfs/calendar.txt
> .import gtfs/routes.txt
> .import gtfs/shapes.txt
> .import gtfs/stops.txt
> .import gtfs/stop_times.txt
> .import gtfs/trips.txt

Python dependencies

This application is intended to be run with python 3.7. You need to have the following python packages installed:

• flask

Alternatively, if you have nix installed, you can simply run nix-shell shell.nix to enter a shell with all required packages installed.

Running

You have to specify the URL from which bus data will be acquired via an environment variable, like this:

$ export LOGGING_SERVICE_URL=http://localhost:5001

You can run the application with flask run -p PORT, where PORT is the port on which you want the application to serve the frontend.