{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Carbonate Rock",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Carbonate",
     "url": "ecedb6dd45a9d7852f392aff118b7579",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWPJy8/f/p+ByYGBCoCR4d8BFpBh75UcOahhoOC9/Q4sDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERhowM/w6ASlpqGAYyCwDvhg9JH6iLFQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Carbonate"
     ]
    },
    {
     "label": "Chesapeake Group",
     "url": "cad50ad18ef3f5a6551d0633ba67bc17",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLMzbzsTI4MBABfDvP8MBFpBhFVE/OKhhYMcyDgcWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIw3//GQ6ASlpqGAYyCwAhNg/To8x1uQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Chesapeake Group"
     ]
    },
    {
     "label": "Minor carbonate",
     "url": "fa660bcfef639cec2c1f5e4df9b758f5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLMzfzsTE5MBABfDv378DLCDDqlrsOahhYFvNQQcWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIw3///h0AlbTUMAxkFgCPtBNeTcr08wAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Minor carbonate"
     ]
    },
    {
     "label": "Mixed carbonate and non-carbonate",
     "url": "ddacfa4bec05b5fd4aa632a28c3f4461",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWPJL8zfzsDI5MBADfD/3wEWkGGyQZ4c1DDv8brtDiwMVAYsowZSDFgoNwIVjBpIOWChghkoYNTAkRGG//8dAJW0VDHt/78DABfHEOTmBpxBAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Mixed carbonate and non-carbonate"
     ]
    },
    {
     "label": "<all other values>",
     "url": "338ff8bb56c87a26ab2cd2383d74d675",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWPJz8/fzsDA4MBAHXCABWSYsLAwBzVMe/v2rQPIQKoCllEDKQYslBuBCkYNpBywUMEMFDBq4EgJwwOgkpZK5h0AAEzKC2T03wVLAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Carbonate Level"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}