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     "height": 20,
     "width": 23,
     "values": [
      "Coal Mine",
      "Open Pit Mine",
      "Open Pit Mine or Quarry",
      "Placer Mine",
      "Pumice Mine",
      "Silica Mine",
      "Strip Mine",
      "Uranium Mine"
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    },
    {
     "label": "Prospect Pit",
     "url": "9ede62d09d4be1a58eed231ff903671e",
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     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Prospect Pit"
     ]
    },
    {
     "label": "Pit - various",
     "url": "6a5f201f513d9a6d2b5ee7b987e83cf3",
     "imageData": "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",
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     "height": 20,
     "width": 20,
     "values": [
      "Borrow Pit",
      "Caliche Pit",
      "Cinder Pit",
      "Clay Pit",
      "Gravel Pit",
      "Gravel/Borrow pit - Undifferentiated",
      "Pumice Pit",
      "Quarry",
      "Quarry - Gypsum",
      "Quarry - Limestone",
      "Quarry - Pumice",
      "Quarry - Rock",
      "Sand Pit",
      "Sand and Gravel Pit",
      "Shale Pit"
     ]
    },
    {
     "label": "Other features",
     "url": "0b5007ca30efe80d55c48f4bb08b9fdc",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAANBJREFUOI3t0jFKBEEQBdDHslkjGwii4A00MhEVQcU7mHgAA01MRTb2BF7CUxiIeAZzQZBdkZ+KwTKR08OOion+sAteUVU99MMZ/oO/Ag4wwivevwOOSimXSbZLKYuY4D7JFZ76ggu4SXIISZr3TWzgqIa2gqWUiwZryS7GOJkbTHJQwZqGe0kGWnZaG3mlC0yybHaoybzgFKsd5tTs6p9SA++w3gE+qHyhGniOHay11B5xVutUA4MtXGMfS3jBLU7x3BeENxx31HuDX8ofBD8Ax6EzPRxnKeAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Air Shaft",
      "Diggings",
      "Leach Pond",
      "Mine Dump",
      "Ore Stockpile/Storage",
      "Settling Pond",
      "Tailings - Undifferentiated"
     ]
    }
   ]
  },
  {
   "layerId": 5,
   "layerName": "USMIN_625k_Polygons",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
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