{
 "layers": [
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   "layerId": 0,
   "layerName": "Roads by categories (National, provincial, rural, etc) as polyline",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
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     "groupId": "0",
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     "width": 20,
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     "label": "Provincial/District road",
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     "groupId": "0",
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     "label": "Rual road",
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     "groupId": "0",
     "height": 20,
     "width": 20,
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    },
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     "label": "Residential road",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Ferry and river transportation route",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Railway access road",
     "url": "e2d9a84030def268bb639a62c4e8e849",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Highway",
     "url": "d5b475fe6062fd06b94a0b538fb119fd",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAUUlEQVQ4jWNhoDJgGTVwhBnoQKFZB1AM3N/fv58S0xwLCxlRDDx44QIl5sEB7cLQ3sCAMpMWLkQ10LGw0JEyExlQDWSAxhI1DaQKGDVwEBoIAPydC3dhROAZAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Walking track",
     "url": "462ce0f549514438f507f68b32adebbb",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAU0lEQVQ4jWNhoDJgGTVw1MDBZGBmZmY5NgV///49OmvWrCMwNeh8mLrp06d3EuVCZmZmawYGhiMww3HwMV0IswEfgLrsCC4+US4kFYwaOGogGQAACgInF2B7NzIAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Tunnel",
     "url": "54465659598b6fe0699e507dc6fc28e5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAUUlEQVQ4jWNhoDJgGTVwhBnoQKFZB1AMTEpK2k+JafPmzWNEMfD+/fuUmAcHtAtDRUVFigzav38/qoHz5s1zpMhEKED28gFqG0gVMGrgIDQQAEA4DSlLQrwUAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "ທາງ / Roads"
    }
   ]
  }
 ]
}