{
 "layers": [
  {
   "layerId": 0,
   "layerName": "NO2_AQ_Stations",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "9f060c08f0ac425b21eda2c14bceb15f",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbUlEQVQ4je3Syw2AIBBF0TvJ9CVtWI1SjW1gZRg+GjcaATcS34bVHF4yo7wc/cHmaDvRHegXDGAQJsDhsTLi6htKhAJKftcIV4Mc2PmDuR702IzsuWz3tGEAhtg04K2gpAXcIp3dYWm0eOLz4AY4yhIr9hiX7QAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "No2_Grid",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "dc76f690a446486c5251e192d81b328c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4je3UsQnAMAxE0V/cYN5MZDNvZpNgQVyfSn0Q6l6hQgIWhensB5imNYBIcBaA/MGy1KCdfOKuQT8VGFcN+uUN3+fo9hkJxhm7DcPmBs0lsZ6yAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Cities",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "f69d0d03b187fae4b88aa619fcfb0e2c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLCzczsjI6MBABfD///8DLCDDoqKiOKhh4LJlyxxYGKgMWEYNpBiwUG4EKhg1kHLAQgUzUMCogSMiDP///38AVNJSwzCQWQCLOROSGAPyCQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}