{"streets":"街道图","satellite":"影像图","hybrid":"带标注的影像","terrain":"带标注的 Terrain","topo":"地形图","gray":"浅灰色画布图","dark-gray":"深灰色画布图","oceans":"海洋图","national-geographic":"国家地理","osm":"OpenStreetMap","streets-night-vector":"世界街道图(夜间)","streets-relief-vector":"世界街道图(含地貌)","streets-navigation-vector":"世界导航图"}