{"streets":"Street","satellite":"Imagery","hybrid":"Imagery(Label)","terrain":"Terrain(Label)","topo":"Topographic","gray":"LightGrayCanvas","dark-gray":"DarkGrayCanvas","oceans":"Ocean","national-geographic":"NationalGeographic","osm":"OpenStreetMap","streets-night-vector":"WorldStreetMap(Night)","streets-relief-vector":"WorldStreetMap(Relief)","streets-navigation-vector":"WorldNavigationMap"}