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 "layers": [
  {
   "layerId": 0,
   "layerName": "Functional Class",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
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     "label": "FC=1, Interstate",
     "url": "53be5c058e104587f655ac01b4713473",
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     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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     "label": "FC=2, Other Freeways and Expressways",
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     "label": "FC=3, Other Principal Arterial",
     "url": "59397ab17451bdde01f4bb37b5967140",
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     "label": "FC=4, Minor Arterial",
     "url": "c0aa0ce4d975df7e30b4890c1b7c95c3",
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     "contentType": "image/png",
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     "values": [
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    },
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     "label": "FC=5, Major Collector",
     "url": "ab1ce9dd0a2e475de8ed65feb6a7681f",
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     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "FC=6. Minor Collector",
     "url": "d97053c1a543f9c11ad0564daa3c7f41",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYBk1cNTAwWLg//8M/6lhGCMjAyNtXMjIyMBIVQOpCUYNHDWQDAAAdmEDVPjlPH4AAAAASUVORK5CYII=",
     "contentType": "image/png",
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     "values": [
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    },
    {
     "label": "FC=7, Local Road",
     "url": "f9f32900e4805e4d837f00df3d11404c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAC9JREFUOI1jYaAyYBk1cNTAYWvg2bNn/1PDMGNjY0YWGIMaBjIwDJkwHDVwmBsIACaZBOsOKS3wAAAAAElFTkSuQmCC",
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     "values": [
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