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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWM5depEFjs7mwMDFcDPn78OsLCzsznIykmFUsPAx4+eMbBQwyBkMGrgqIGjBo4aOGog1MCfP38dePzoGVUM+/nz1wEA5WUUw2czejAAAAAASUVORK5CYII=",
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     "width": 20,
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    },
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWPZeWBLFjMzgwMDFcDfvwwHWJiZGRw4BBlDqWHgj/f/GVioYRAyGDVw1MBRA0cNHDUQauDfvwwHfrz/TxXD/v5lOAAAFBoR3TkGs1IAAAAASUVORK5CYII=",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     "label": "Swamps or marshes",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWM5depMFjsrmwMDFcDP378OsLCzsjnIy8qHUsPAh48fMrBQwyBkMGrgqIGjBo4aOGog1MCfv38dePj4IVUM+/n71wEA8qwUwyCImEQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "SoM"
     ]
    },
    {
     "label": "Streets",
     "url": "387b482926055bfbd7a1344b938211c5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWM5depEFjs7mwMDFcDPn78OsLCzsznIykmFUsPAx4+eMbBQwyBkMGrgqIGjBo4aOGog1MCfP38dePzoGVUM+/nz1wEA5WUUw2czejAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Str"
     ]
    },
    {
     "label": "<all other values>",
     "url": "51fa6ddc85d19a7d1e15586235dcd059",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWO5mJWVxf7+vQMDFcBPQcEDLOzv3zuoL18eSg0Db0ZGMrBQwyBkMGrgqIGjBo4aOGog1MCfgoIHbkZGUsWwn4KCBwA1SBEbPUrkNQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "ESRI TYPE"
    },
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     "id": "1",
     "heading": ""
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   ]
  }
 ]
}