{
 "layers": [
  {
   "layerId": 0,
   "layerName": "建筑形变预警面点位357",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "24054600117cc1b57d4f73c05389a0dc",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAkUlEQVQ4je2QwQnDMAxF3yHH3tMJmo6RAVIykt2RTDqAx7A8QXrXAL04JVBw4qRHPzDCIJ6+1PBnmiqswi82VZ/eKaG9PkYDoCJGY3iuBhQL+8vtbtphBKAd4P1yZp7cOnWhsOs2WsqEP6gIZO64JbTz5FARsyRNNzwsBLAag9cY+uWfa967ss+lOiLcTRWe5wPOASmVOQzfDwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}