UK: Aerial mapping company Bluesky has produced a prototype map showing where it may be unsafe or even illegal to fly drones. The UAV Flight Restriction Map is based on 3D aerial mapping of various geographic datasets. The colour-coded map uses a traffic light system to identify different zones. For example, No Fly Zones are shown in red. Areas close to no fly zones where further advice should be sought are displayed in amber. And Free Fly zones can be seen in green. The map also takes into account aerial obstacles, like overhead power lines and restricted airspace.