cafein.sampledata

Sample datasets for cafein: up-to-date, openly licensed data for the Helsinki Metropolitan Area, downloaded on first access and cached locally.

import cafein.sampledata.helsinki as helsinki

helsinki.osm_pbf          # OpenStreetMap extract, capital region
helsinki.gtfs             # HSL GTFS feed
helsinki.dem              # NLS 10 m elevation model
helsinki.population_grid  # HSY 250 m population grid
helsinki.emission_factors # cafein's default GHG factors as a CSV

Each attribute is a pathlib.Path; the file downloads and verifies on first use. A package release pins exact data snapshots — upgrade the package to get newer data.

Data files are cached under the platform user-cache directory; set CAFEIN_SAMPLEDATA_DIR to relocate the cache.

Data licenses

The package code is MIT. The datasets carry their own open licenses — OpenStreetMap (ODbL 1.0), HSL GTFS (CC BY 4.0), National Land Survey of Finland elevation model (CC BY 4.0), HSY population grid (CC BY 4.0) — with attribution recorded per asset in <region>.metadata.

Development Status
- 3 - Alpha
Intended Audience
- Science/Research
License
- OSI Approved :: MIT License
Operating System
- OS Independent
Programming Language
- Python :: 3
Topic
- Scientific/Engineering :: GIS

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The following attestation bundles were made for cafein_sampledata-2026.8.0.tar.gz:

Publisher: release.yaml on cafein-py/cafein.sampledata

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: cafein_sampledata-2026.8.0.tar.gz
- Subject digest: 7af52bb1fd00c08e5bc9986085c6105458d988a05fdc0da84aa2d013eb5e8d4f
- Sigstore transparency entry: 2417076882
- Sigstore integration time: Aug 11, 2026
Source repository:
- Permalink: cafein-py/cafein.sampledata@cdca80dea10a72a2554e1e8d6455573f7f8a1f12
- Branch / Tag: refs/tags/v2026.8.0
- Owner: https://github.com/cafein-py
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yaml@cdca80dea10a72a2554e1e8d6455573f7f8a1f12
- Trigger Event: push