Public/private airports (local NASR DB · <50ms). Used for constraint intersection · which airports fall inside a drawn area.

FAA NASR LOCAL · 28-day AIRAC

Center boundaries. Used to identify which ARTCC TMU owns the airspace inside a drawn constraint.

FAA ArcGIS · adds-faa.opendata.arcgis.com · cached 24h

TRACON footprints. Useful context when assessing GDP/GS scope at satellite airports.

FAA ArcGIS · cached 24h · loads on demand

Class B shelves. Overlaid as reference when drawing constraints near major hubs.

FAA ArcGIS · cached 24h · loads on demand

Class C rings. Reference geometry for approach control boundaries.

FAA ArcGIS · cached 24h · loads on demand

Class D cylinders. Toggle for controlled-tower airport reference.

FAA ArcGIS · cached 24h · loads on demand

Active/scheduled SUA. ATLAS highlights SUA overlap when evaluating military TFR or route-blockage constraints.

FAA ArcGIS · cached 24h · loads on demand

J/V airway backbone. Reference for reroute planning · which airways pass through a constraint area.

FAA ArcGIS · cached 24h · loads on demand

Named fixes. ATLAS identifies fixes inside a drawn constraint to suggest MIT/MINIT fix targets.

FAA NASR LOCAL · loads on demand

Ground-based navaids. Reference layer · aids in identifying routing anchor points near constraints.

FAA NASR LOCAL · loads on demand

NOTAMs with geographic coordinates from SWIM feed. Shown as semi-transparent circles over affected areas. Requires active SWIM connection.

FAA SWIM AIM feed - coordinate-bearing NOTAMs only - live

Live aircraft positions from FAA SWIM FDPS FIXM feed. Shows callsign, origin to dest, altitude, speed. Only available when SWIM is connected (not stub mode). Auto-refreshes every 60s.

FAA SWIM FDPS feed - live aircraft - auto-refresh 60s

Shapes drawn by this session. Each saved constraint runs impact analysis - airports, fixes, CDRs, traffic exposure.

User-drawn - session state - saved to ATLAS DB on draw