{
 "layers": [
  {
   "layerId": 0,
   "layerName": "管線(>=50000)",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 50000,
   "legend": [
    {
     "label": "",
     "url": "c055628ac2d7318422bcff425bdb4b23",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAOUlEQVQ4jWNhoDJgGTWQYsBCuRGoYNRAKobhcgaGBkoMioTqZ0EXoBSwUMMQZDBqIOWAhQpmDDEDAXozAyqO1diLAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "管線(25000,15000)",
   "layerType": "Feature Layer",
   "minScale": 49999,
   "maxScale": 10001,
   "legend": [
    {
     "label": "",
     "url": "c055628ac2d7318422bcff425bdb4b23",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAOUlEQVQ4jWNhoDJgGTWQYsBCuRGoYNRAKobhcgaGBkoMioTqZ0EXoBSwUMMQZDBqIOWAhQpmDDEDAXozAyqO1diLAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}