transitio 0.1.0

AOI-driven OSM and GTFS acquisition, validation and repair — companion to pyrosm and cafein

transitio

AOI-driven OSM and GTFS acquisition, validation and repair — companion to pyrosm and cafein. transitio moves the raw ingredients of routing — OSM extracts and GTFS timetables — from the open data ecosystem to your area of interest, validated and repaired, ready for cafein to brew into routing results.

Status: early development. Acquisition (Mobility Database catalog + OSM extracts), GTFS validation, repair and cropping are in place, tied together by the one-call transitio.fetch pipeline.

Quick example

import transitio

# One call: OSM extract + validated GTFS feeds for an area of interest.
result = transitio.fetch(helsinki_polygon)        # any shapely geometry,
                                                   # bbox tuple or place name
result.osm_pbf     # cropped OSM extract (path)
result.feeds       # downloaded, cropped and validated GTFS feeds (paths)
result.reports     # per-feed merged validation reports
result.skipped     # (feed id, reason) for anything left out

net = result.to_cafein()   # routable cafein.TransportNetwork
osm = result.to_pyrosm()   # pyrosm.OSM reader over the extract

fetch accepts when="2026-09-01" to pick the dataset versions covering a service day (needs a free Mobility Database API token, passed as refresh_token= or via the MOBILITY_API_REFRESH_TOKEN environment variable), modes=["rail", "tram"] to keep only feeds serving given modes, and repair=True to repair feeds before use. With a token, GTFS downloads are catalogued dataset versions verified against catalog checksums; without one, the latest hosted zips are fetched as-is — unverified moving targets.

Lower-level access

Each pipeline stage is available on its own:

db = transitio.MobilityDatabase()

feeds = db.search_feeds(aoi=helsinki_polygon)
dataset = db.dataset_for(feeds[0], when="2026-09-01")
path = db.download(dataset)                        # cached, checksum-verified
report = db.validation_report(dataset)             # hosted canonical-validator report

pbf = transitio.fetch_pbf(helsinki_polygon)       # cropped OSM extract
validation = transitio.validate_feed(path)        # canonical-code notices
transitio.repair_feed(path, "repaired.zip")       # gtfstidy-contract repair
transitio.crop_feed(path, "cropped.zip", aoi=helsinki_polygon)

Documentation

The Sphinx site lives in docs/. Building it needs transitio itself installed (autodoc imports the real package) plus the Sphinx toolchain:

pip install . -r docs/requirements.txt
sphinx-build -b html docs docs/_build/html

The hosted version lives at https://transitio.readthedocs.io.

Installation

pip install transitio

Binary wheels cover Linux, macOS and Windows. Building from source instead requires a Rust toolchain (pip install .).

License

MIT