Ключевые слова: aerial photography, ancient building, ancient capital, ancient city of xian, architecture, bell tower, china, chinese elements, city, city building, city night view, cityscape, clock tower roundabout, crossroads, landmark, landmark building, light, night view, overlook, scenery, street, traffic flow, transportation, urban landscape, vehicle, xian, xian landmark, xian landmark building, xian scenery, xian tourism,