Primary Sources & Aeronautical Endpoints

Full documentation of every official feed, regulatory publication, and reference dataset utilized by TFR Archive. All government works are attributed in accordance with open access standards.

Key facts

Primary Source: Federal Aviation Administration (tfr.faa.gov and NOTAM System Operations).
Licensing: Public domain United States Federal Government works (17 U.S.C. Section 105).
Secondary Cross-Check: FAA NOTAM API (api.faa.gov) and FAA NOTAM Search (notams.aim.faa.gov).
Basemap Provider: OpenFreeMap vector tiles utilizing OpenStreetMap data.

1. Official FAA Endpoints

tfr.faa.gov: Primary live feed providing list XML/JSON feeds and detailed per-NOTAM geometry XML files with shape circles and polygon vertices. Verified active September 2026.
FAA NOTAM API (api.faa.gov): Secondary verification channel querying active NOTAM records by designator.
FAA NOTAM Search (notams.aim.faa.gov): Reference channel for raw text NOTAM verification and D-NOTAM sequence identification.
FAA 28-Day Aeronautical Data (NASR): Official airport and landing facility geographical directory.

2. Regulatory & Statutory References

14 CFR Part 91 & Part 99: Electronic Code of Federal Regulations (eCFR) statutory legal taxonomy.
FAA Advisory Circular AC 91-63: Standard phrasing and procedural definitions for temporary flight restrictions.

3. Map & Vector Tile Services

OpenFreeMap / Protomaps: Vector map tiles served via Cloudflare edge. Map data (c) OpenStreetMap contributors.
MapLibre GL JS: Self-hosted BSD-licensed map rendering engine, loaded strictly on-demand.

Source: FAA tfr.faa.gov and System Operations NOTAM publication. Captured: 2026-09-23 23:00 UTC. Permanent record preserved by TFR Archive under public domain principles.