{
 "layers": [
  {
   "layerId": 0,
   "layerName": "县",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "df1cbb5ff47a2fecb7c61821967ecb0e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLCzazsjI5MBABfD//78DLCDDEhI6OKhh4IIFFQ4sDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERhv///zsAKmmpYRjILACW/BNY/yWW2gAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "WhiteBuildingModel",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "ef28799480cb5ccfa49e85cd938a4955",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLCrczsjE5MBABfD/378DLCDDvDsaOahh4NaKegcWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIw////h0AlbTUMAxkFgCc3hNLWJZczwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}