[
  {
    "url": "https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?o=json&incl=ImageryProviders&key={bingKey}",
    "name": "Bing Maps: Aerial Imagery",
    "formatId": "BingMaps",
    "transparentBackground": false
  },
  {
    "url": "https://dev.virtualearth.net/REST/v1/Imagery/Metadata/AerialWithLabels?o=json&incl=ImageryProviders&key={bingKey}",
    "name": "Bing Maps: Aerial Imagery with labels",
    "formatId": "BingMaps",
    "transparentBackground": false
  },
  {
    "url": "https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Road?o=json&incl=ImageryProviders&key={bingKey}",
    "name": "Bing Maps: Streets",
    "formatId": "BingMaps",
    "transparentBackground": false
  },
  {
    "url": "https://b.tile.openstreetmap.org/{level}/{column}/{row}.png",
    "name": "Open Street Map (Tile Server)",
    "formatId": "TileURL",
    "transparentBackground": true
  }
]