Before starting: you must have an instance of gtfs-api@v1.1.0 (versions 2.0 and later will not work) running with any feeds to be rendered already loaded. Note: The default endpoint for gtfs-api is http://localhost:4567/api/graphql.
Clone the repo, and install yarn if necessary.
Run yarn install to install the dependencies.
Copy the config-template.js file to config.js. Update config.js for your purposes (at minimum, the gtfs-api endpoint and GTFS feed IDs must be specified).
Run yarn generate to render the tiles. They will be written to a directory specified in the config (by default, ./tiles) using the Z_X_Y.png naming convention.
To view your tiles on a simple map-based demo application, run yarn demo and open the specified URL in a web browser.
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The
generatescript renders both standard-resolution and high-resolution ("retina") tiles. The retina tile filenames are appended with '@2x'. -
The script only writes tiles that do not already exist on disk. To force a fresh render of previously rendered tiles, you must manually delete the existing tiles before running the script.
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The script only writes tiles that contain routes or stops; "blank" tiles are not written at all. Modern mapping libraries typically handle missing tiles cleanly, but this package also includes a utility script for creating empty tile images for any "blank" tile within the rendering bounds. To run this script, run
yarn blanksafter runningyarn generate. -
Results from the gtfs-api queries are cached to the
./cachedirectory; these cached results are used on any subsequent executions of the script. To force a fresh reload of a feed from the API (i.e. if the data has changed), you must manually delete that feed's cached result. -
A simple way to generate tiles for multiple GTFS files is to place them in a single directory, set the gtfs-api directory in
application.confto this location, and use all of the filenames (without the.zipextension) as the feed IDs in gtfs-tiler's config.