City map Light Regionalverband FrankfurtRheinMain — Inscription of extensive waters

City map of the Regional Association FrankfurtRheinMain Optimised as a background map with simplified display and reduced data.法兰克福莱茵美因区域联合会（Regional Association FrankfurtRheinMain）城市地图，经优化用作底图，采用简化显示与精简数据量的处理方式。