@squawk/airspace-data

  @squawk/airspace-data

Pre-processed GeoJSON snapshot of US airspace geometry from the 2026-04-16 FAA NASR cycle. Data only - no query logic, no dependency on @squawk/airspace.

Part of the @squawk aviation library suite. See all packages on npm.

Coverage

• Class B, C, D, and E controlled airspace (E2 through E7 subtypes)
• Special Use Airspace: MOAs, restricted, prohibited, warning, alert, and national security areas
• ARTCC (Air Route Traffic Control Center) lateral boundaries for all US-controlled centers, published per stratum (LOW/HIGH/UTA, plus oceanic CTA/FIR where applicable)

Usage

import { usBundledAirspace } from '@squawk/airspace-data';

// Inspect metadata
console.log(usBundledAirspace.properties.nasrCycleDate); // YYYY-MM-DD
console.log(usBundledAirspace.properties.featureCount);

// Use with @squawk/airspace for zero-config airspace queries
import { createAirspaceResolver } from '@squawk/airspace';

const resolver = createAirspaceResolver({ data: usBundledAirspace });

Consumers who have their own data pipeline can use @squawk/airspace alone and pass any compatible GeoJSON dataset at initialization.

Browser / SPA usage

For browsers, edge runtimes (Cloudflare Workers, Deno Deploy), and any other environment without node:fs, import the async loader from the /browser subpath. It fetches and decompresses the bundled .gz using Web Streams (DecompressionStream) and the global fetch.

import { loadUsBundledAirspace } from '@squawk/airspace-data/browser';
import { createAirspaceResolver } from '@squawk/airspace';

const dataset = await loadUsBundledAirspace();
const resolver = createAirspaceResolver({ data: dataset });

The default URL is resolved relative to this module's import.meta.url, which works under any modern ESM bundler when the package is installed normally.

To host the asset on your own CDN, to use a bundler-resolved (hashed) asset URL, or to override the URL for any other reason, pass an explicit url:

import { loadUsBundledAirspace } from '@squawk/airspace-data/browser';

const dataset = await loadUsBundledAirspace({
  url: 'https://your-cdn.example/airspace.geojson.gz',
});

The loader also accepts a custom fetch implementation, which is useful in tests or in edge environments that need a configured fetcher.

Data format

The export is a GeoJSON FeatureCollection. Each feature's geometry is a Polygon representing one airspace boundary. Feature properties include:

Property	Type	Description
type	string	Airspace type (CLASS_B, CLASS_C, CLASS_D, CLASS_E2-E7, MOA, RESTRICTED, ARTCC, etc.)
name	string	Human-readable name
identifier	string	NASR designator, airport identifier, or 3-letter ARTCC code
floor	AltitudeBound	Lower vertical bound
ceiling	AltitudeBound	Upper vertical bound
state	string or null	Two-letter US state abbreviation
controllingFacility	string or null	Controlling ARTCC or facility (null for ARTCC features)
scheduleDescription	string or null	Operating schedule text
artccStratum	ArtccStratum or null	For ARTCC features, the stratum (LOW, HIGH, UTA, CTA, FIR, CTA/FIR); null for all other types

AltitudeBound is { valueFt: number, reference: 'MSL' | 'AGL' | 'SFC' }.

Data source

All geometry and metadata is derived from the FAA National Airspace System Resource (NASR) 28-day subscription, which is public domain. Class B/C/D/E boundaries come from the NASR ESRI Shapefile, SUA boundaries from the AIXM 5.0 XML files, and ARTCC boundaries from the ARB_BASE.csv and ARB_SEG.csv tables in the NASR CSV distribution. The build pipeline that produces this dataset lives in tools/build-airspace-data.