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   "layerId": 1,
   "layerName": ".surficial_sediments",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
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     "height": 20,
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    },
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    },
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    },
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    },
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     "label": "{hard_bottom}",
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   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
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    },
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    },
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     "values": [
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    },
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    },
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   "maxScale": 0,
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     "values": [
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    },
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    },
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    },
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     "label": "{nodules_slabs}",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "{rocks_rock_fragments}",
     "url": "5bb56e64f9be9ce2f89c9689b97e4a9b",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "rocks, rock fragment"
     ]
    },
    {
     "label": "{hard_bottom}",
     "url": "015a89a6c580ecc5d969b868314e47aa",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAz0lEQVQ4je3SsQ7BQByA8e/PhakPwE6fwyImJMTMZkRfoA+gJonEZPECQiJhsHgIzF4Ao/QEMZBWHBaJL7nmhusv7d0pvpz6gz+4h60UJREqGuKimVob+i74b4GOTQ9N/TyX66OwT1Nxk2TdBUcjsGmTu2EPZXZbGkDbCIz65PXlswISisagjiDoEE+IhL2nQkGfiUjgL4NmZAx2NoydNAOgem+xPFh4xuA5b03NsZmjKQvEEGZWgm4n5IRfuofeiiFcxrXV8/WKL6f+IJ92Av9AMOfDvE1dAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    }
   ],
   "legendGroups": [
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