{
 "layers": [
  {
   "layerId": 3,
   "layerName": "Gas Leak Survey",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Grade 1",
     "url": "155484703d9d7297ed82772af08728c1",
     "imageData": "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",
     "contentType": "image/png",
     "groupId": "0",
     "height": 30,
     "width": 20,
     "values": [
      "1"
     ]
    },
    {
     "label": "Grade 2",
     "url": "6d2ad8798f8f89ddbba5b6c9e181d7eb",
     "imageData": "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",
     "contentType": "image/png",
     "groupId": "0",
     "height": 30,
     "width": 20,
     "values": [
      "2"
     ]
    },
    {
     "label": "Grade 3",
     "url": "994b9c6b10d63949616be0207af9f93c",
     "imageData": "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",
     "contentType": "image/png",
     "groupId": "0",
     "height": 30,
     "width": 20,
     "values": [
      "3"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Leak Grade"
    }
   ]
  }
 ]
}