{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Railroads",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "e41ecdd3c55c6927f69b58bf2232dbf6",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADtJREFUOI1jYaAyYBk1cNRArOA/AwMDIzUNxAtoauB/EvRhU8uIbiDOcMFi2OAOQ7w+GRQuHDWQxgYCALB1BFKn7jpVAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "Dams",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Locks",
     "url": "2178803c97fb87c4d85dc6867f349d19",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADJJREFUOI1jYaAyYBk1cCQZmFZx7j8lBs3qMGJEMZBaYNRAKhoIiyWqGUgtMGrgIDQQAOxQBabKqwbCAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Y"
     ]
    },
    {
     "label": "No Locks",
     "url": "a1c704373881f61cd05e1bb5761664f5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADJJREFUOI1jYaAyYBk1cCQZ+Gwmw39KDJJKZ2BEMZBaYNRAKhoIiyWqGUgtMGrgIDQQAENgA9PNuLQsAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "N"
     ]
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Airports",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "0caea56108eeac5e4c4c27136b433efd",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAJ1JREFUOI211L0RgCAMBlC5o3MCBmITWntGsLdlDSrXYAfGwCp3EYJgounI5d59x59ePi79G2jMUaRYzpvSdcO6nYTP4BVe13MprveE1NAshmu4hzMYpBuCs1jOm4Iz6IJvMNwjQS5GghzMur2kSIBc7DGhBOuCXIwEJVgDSjEyIQc7gx9f7DfYMCEXa0D8yPH/CJe2LjwDAXTdkNYFnR2N4+4NdVAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}