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 lives in NOTICE in the repo; this page reproduces it so it’s reachable from the deployed site.
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.
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.
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.
addr:* nodesSame ODbL 1.0 terms as the road network attribution above. The same Produced Work notice applies.
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.
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.
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.