config.json

{
  "map": {
    "baseLayers": [
      {
        "id": "S2",
        "name": "Sentinel-2",
        "config": {
          "id": "wmts",
          "url": "https://{s}.s2maps-tiles.eu/wmts/1.0.0/{Layer}/{Style}/{TileMatrixSet}/{TileMatrix}/{TileRow}/{TileCol}.jpg",
          "subdomains": ["a", "b", "c", "d", "e"],
          "layer": "s2cloudless-2018_3857",
          "style": "default",
          "format": "image/jpeg",
          "requestEncoding": "REST",
          "matrixSet": "g",
          "tileGrid": {
            "maxZoom": 19
          },
          "srs": "EPSG:3857"
        }
      },
      {
        "id": "bing",
        "name": "Bing",
        "config": {
          "id": "bing",
          "imagerySet": "Aerial",
          "key": "AmEV-s101vB0DGqgW8Y9rjCWBg3ZinPm_y-QM6RXHmds_mSiZDbYxeEFcugx10rr",
          "maxZoom": 19
        }
      },
      {
        "id": "osm",
        "name": "OpenStreetMap",
        "config": {
          "id": "osm"
        }
      }
    ],
    "projections": [
      {
        "code": "EPSG:3857",
        "name": "Mercator"
      },
      {
        "code": "EPSG:4326",
        "name": "Geographic"
      }
    ],
    "renderers": [
      {
        "id": "ol",
        "name": "2D"
      },
      {
        "id": "cesium",
        "name": "3D",
        "props": {
          "allowFreeCameraRotation": false,
          "sceneMode": "globe"
        }
      }
    ],
    "initialOptions": {
      "baseLayer": "S2",
      "projection": "EPSG:3857",
      "renderer": "cesium"
    },
    "initialState": {
      "view": {
        "viewport": {
          "center": [12.5, 41.9],
          "resolution": 6000
        }
      }
    }
  }
}