FAA Aeronautical Information Services Open Data
ArcGIS Open Data hub published by "Federal Aviation Administration - AIS" carrying 73 datasets — class airspace, frequencies, runways, navaids, obstacles, VFR and IFR chart tile services. Every feature dataset is offered as an ArcGIS GeoServices REST FeatureServer plus bulk CSV, GeoJSON, KML and shapefile download, and the hub publishes a DCAT-US 1.1 catalog. Verified 2026-07-28 (HTTP 200, 73 datasets).