{
 "layers": [
  {
   "layerId": 0,
   "layerName": "卡口",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "a81d249056ff83de8e83a11425bf4ef1",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAF9JREFUOI3t0TEKwDAMQ9EfyHF9HN/X3brUcppQSijVKPAbrM7D6T/4ChhJ11bBcPxSGhYKrcAUA3BcogqU2Aj9xsp7gs2wchjDYGLlElXYCDzRrFcHd34oj1fBqewPHgyMGSrpgfCsAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "道路",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "b80444f60e4d643696dd4822b94bc2c2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADNJREFUOI1jYaAyYBk1cNTAwWQg++S//ykx6GcuMyOKgdQCcANhNlDNQGqBUQNHDSQDAAByVAW7Bbzz8AAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}