{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Carbon Monoxide",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "c3db4cd4f6abdd33c30d159beb7e776c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAkUlEQVQ4ja2UUQ6AIAxDS9L7X3n+iJk4aDHsxymvZKQVAggcLN7PJrgwGdAQ9DWLYZqwEuRvDoO+YSWoxJLhRND7qpYMcbg4vKsjS4YTcGaCZCimyQKHgRNslcGXUY4pv4IdhgFbwW6GARUXK5cdAzLXezh/irpZtoMdhgFjj3HDbQN2g+3cPh9unHB2RMU8axc4kUBgzw1QzAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "PM10",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "020fbe9112bc06d0fad4b9274d02015d",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAnklEQVQ4ja3VwQ2AIAxA0Zp0FM9dwSXYgQM7sIQndzBu5RwaFAka0FraAwfTvGDyE9D5cQPFwXBYM6QPRNQ9l5xfNmv6zx2A9QQ1MGt6mOYMbMWuQU0szO2XW7EiKMWIqAvFoBYGcVATS6AWloXdjjlp2DXMSsJ+w36HXdoTh83FWGFzMeKE/QeDONWwJVgCtbDshuvR0B14Pg2cHYAd25in+dy6MbQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Ozone",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "28bcfd905529adfc5f7f881dbf957ac8",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAi0lEQVQ4jWMRX/HiPwMVAQuIeBkhwUgNw8RXvPgPNhAFxDxDuHiJFMkWseA0jEzAglOGDNehGkgF1+F3IUUGxlAWEcgAfyyTYkEMRB9hL5Poeha8rkF3LYiPy9AlUowMPsgJG5tCmBgJKYCFKFUkRBQLqRqIM5CKgGUEGBiDmgLINxBHUgIbSM1qAAC9rS/QafNs1gAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}