+ arcgis_world_imagery:
+ {name: "ArcGIS World Imagery", // see https://server.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer
+ url: "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}",
+ copyright: 'Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.'},