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     "label": "Kilometre Marker Post",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAVdJREFUOI1jYaAyYIEx/v//f4YSg/7//3+NiYkpjoWBgYGh1J/hzPyeGmNyDZNW1mJwC4xCuPD/P3bemPw6sgz78/s3w6qZ3XA+zMv/WVnZyHUgCmAhrIRKBj59eJ9BVEKKgY2dnYGBgYHh9+9fDE/u32WQlJVn4ODkIt3ALUsmM4SmlTMIiYoz/P79i2HlzB4GOVVtBkU1TfJcCAMwwxQ19BmsXbwJKcdv4K9fpBlG0MAVUxsZePlFGT6+fU2UYQQNtPONZdA3tWaY1VbMcO2CDoOWgQllBiqoaDAws7AwhGVUMUytjmXI7VjKICgsSr6BMCAsJs7gm1TDsGJqK0NqVTcDCwsr6QY6BSYwcPHwwvkGFrYMbBycDJ8+vGcQEhEj3UBVLT0UPiMjI4O2oSlOgwgaSC6glYE/FUv9OG6SaQYjA8PP94xFjRZwA3s2M7AzMPykigsBnWxV+QEEpAgAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Kilometre Marker Post"
     ]
    },
    {
     "label": "Reference Station",
     "url": "9a39ee8d8e5bc3e7af3f6e26eb27c1f7",
     "imageData": "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",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Reference Station"
     ]
    },
    {
     "label": "Route Marker - Double numeral",
     "url": "fdf19004b7fdaeb5b6f2d0edcccba9e1",
     "imageData": "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",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Route Marker - Double numeral"
     ]
    },
    {
     "label": "Route Marker - Single numeral",
     "url": "0bdab17c5349b51fb7b918d00c620825",
     "imageData": "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",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "Route Marker - Single numeral"
     ]
    }
   ]
  }
 ]
}