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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTWQYsBCuRGoYIQb+J9CsxhRDPxPoXGMYOOQDGRkhNgwsiKFKoCFOsYgwKiBDBQDAMheA1TchEHEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "1000",
     "url": "7185b361307c1e1a69eec2de218b8d73",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTWQYsBCuRGoYIQb+J9CsxhRDPxPoXGMYOOQDGRkhNgwsiKFKoCFOsYgwKiBDBQDAMheA1TchEHEAAAAAElFTkSuQmCC",
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     "groupId": "0",
     "height": 20,
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    },
    {
     "label": "1100",
     "url": "7185b361307c1e1a69eec2de218b8d73",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTWQYsBCuRGoYIQb+J9CsxhRDPxPoXGMYOOQDGRkhNgwsiKFKoCFOsYgwKiBDBQDAMheA1TchEHEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
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     "label": "1200",
     "url": "7185b361307c1e1a69eec2de218b8d73",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTWQYsBCuRGoYIQb+J9CsxhRDPxPoXGMYOOQDGRkhNgwsiKFKoCFOsYgwKiBDBQDAMheA1TchEHEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "1300",
     "url": "7185b361307c1e1a69eec2de218b8d73",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTWQYsBCuRGoYIQb+J9CsxhRDPxPoXGMYOOQDGRkhNgwsiKFKoCFOsYgwKiBDBQDAMheA1TchEHEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "<all other values>",
     "url": "c91ea2e17403d08eac23bc4cda91312c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAM0lEQVQ4jWNhoDJgGTWQYsBCuRGoYNRA6oXhfwbqAEaYgYxUMpBhNJYpByxUMINhhBsIADThAVLib9EcAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Elev"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}