open-distance

Attribution

open-distance is computed from third-party open data. The notices below must travel with any work derived from those sources (per their licenses). The canonical text is in the NOTICE file in the repository; the same content is reproduced here so it's reachable without leaving the deployed site.

Road network — OpenStreetMap (ODbL 1.0)

Source: Geofabrik per-state PBF extracts. Licensed under the Open Database License, version 1.0.

The road graph tile binaries served from R2 (tiles/<version>/<tx>_<ty>.bin) are a Derivative Database of OpenStreetMap. Per ODbL §4.3, every Produced Work computed from that Database — including every API response from open-distance — must carry the following notice:

© OpenStreetMap contributors. Map data available under the Open Database License (ODbL) v1.0.

open-distance does not publish the Derivative Database itself — only the Produced Works (scalar distance/duration responses) generated from it. The unmodified upstream OSM extracts remain available at Geofabrik under their original ODbL terms; no separate offer of the source data is made by this project.

Operators of forks that publish the tile binaries directly inherit the ODbL §4.4(b) share-alike obligation: the published Derivative Database must itself be available under ODbL.

Addresses — NAD (US DOT, public domain)

National Address Database, U.S. Department of Transportation. Public domain under 17 U.S.C. § 105 (work of the federal government). No attribution is legally required. We acknowledge it anyway:

Address data provided by the U.S. DOT National Address Database.

Addresses — OpenAddresses (per-source)

Per-source per-county and per-city authorities aggregated at batch.openaddresses.io. Each source carries its own license; the per-source attribution is enumerated machine-readably at /attribution/openaddresses.json. A blanket attribution line:

Address data from OpenAddresses, used under the per-source terms documented in the OA manifest.

Addresses (supplementary) — OpenStreetMap addr:* nodes

Same ODbL 1.0 terms as the road network attribution above. The same Produced Work notice applies.

Street segments — TIGER/Line 2024 (US Census, public domain)

TIGER/Line 2024 release, U.S. Census Bureau. Public domain. No attribution required. We acknowledge it anyway:

Street segment data from the U.S. Census Bureau TIGER/Line 2024.

Code dependencies

All runtime and dev dependencies are MIT, ISC, Apache-2.0, BSD, or similarly permissive. The only copyleft component in the dependency tree is LGPL-3.0-or-later on sharp-libvips native binaries, which are wrangler dev-only and never shipped to Cloudflare or to end-users. See package-lock.json for the full SPDX inventory.

How attribution travels with API responses

Every Distance Matrix JSON response carries a copyrights field reproducing the required short-form notice. The /coverage endpoint includes per-source license URLs and a pointer back to this page. The Yoke score badge in the footer is the only external image surface; everything else is served same-origin.