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   "layerId": 0,
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   "layerType": "Feature Layer",
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   "maxScale": 0,
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAaklEQVQ4je2SSwqAMAwFp5JrFezF7Odiir2XdedC1EbsqjjbhMlLiNAY+YWfkX6EOTDawNJMWAxzDriaVI4EiflRWIABnxP+qm4n3KuEWuQ84Y41UtiI6pVrmFK/3yuhRtbZY2sRdWc3wh17UhnJUKXRQAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
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     "values": [
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      "Railbanked,<Null>",
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     ]
    },
    {
     "label": "Abandoned",
     "url": "3333781f07f9c85743755483af3db4d5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAZUlEQVQ4jWNhoDJgGTWQYsBCuRHDysD09HRfED1z5szNxMqzwBiZmZlp6Br+/funB5WTxGYgsvz06dNnEXQhOYAFxoDZgM1L06dPx+vl6UjyeF2IK+zwybMwUBmwjBpIMRj8YQgA8x4kmF3cHVcAAAAASUVORK5CYII=",
     "contentType": "image/png",
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    }
   ],
   "legendGroups": [
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     "id": "0",
     "heading": "Operational Status,Railroad STB Class"
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}