Ключевые слова: airfield, area, background, building, china, circle, city, cityscape, concrete, control, copter, deck, empty, flight, global, h, helicopter, helipad, heliport, horizon, land, landing, landscape, pad, park, place, roof, rooftop, sign, sky, skyline, space, symbol, system, top, transport, transportation, travel, urban, view, white,