ℹ️ About the Risk Zones Clear Airspace
No registered obstacles in this cell. Lowest operational risk.
Plateau Transmission
91% linear infrastructure (power lines, poles, catenaries). Low height variance,
predictable geometry. Obstacles follow known grid corridors.
Urban Vertical
82% vertical structures (buildings, stacks, cranes). 45% lighted.
Concentrated in industrial zones and city centres.
Alpine High-Rise
Highest obstacle heights (mean 107m) at 1,481m elevation. Cable cars,
valley crossings, and mountain station infrastructure.
Airport & Urban
Highest obstacle density (8.1 per cell) and type diversity.
94% of cells overlap with airfield approach surfaces, meaning obstacles
in these cells are registered near an airfield's obstacle limitation area.
This does not imply a runway is present in the cell itself.