{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Airborne Geophysical Surveys",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Spacing not meaningful",
     "url": "b3b47f6410c2387a120c4be5630c86b3",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWMRExObysnJ6cBABfD9+/cDLCDDqqqqtKhhYFtbGwMLA5UBy6iBFAMWyo1ABaMGUg5YqGAGChg1cESE4ffv3w+ASlpqAJBZANENEYmkqOVEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Spacing < 0.5 km",
     "url": "78ce9e4e1d9f580dddc99c701ce41aa8",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATUlEQVQ4je3UIRUAMRAD0QFhlXAOTkXV1FHJqamp8nsLizesOwI+CIgemA06hjYsBfbB6wAHIMypwHTKE2cF5pPBOCrwig03rHhaR2H90IsIRtBhF8MAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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      "0.15",
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      "0.27",
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    },
    {
     "label": "0.5 <= Spacing 1 km",
     "url": "7264f526320ef6b140072879ad650bcb",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWNRkRWbys/D6cBABfDxy/cDLCDDziyu0qKGgSaxbQwsDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERhh+/fD8AKmmpAUBmAQCJyhEadSI5IgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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      "0.53",
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      "0.8"
     ]
    },
    {
     "label": "1 <= Spacing < 2 km",
     "url": "c1c80c891410357811827c645ecaa69a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWNRURGbys/P6cBABfDx4/cDLCDDzpyp0qKGgSYmbQwsDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERhh8/fj8AKmmpAUBmAQDHchD1jOKD1AAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "2 <= Spacing < 5 km",
     "url": "f568d2ecdae9de10c67ea34fa0ae966c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMRU5GdysnP48BABfD945cDLCDDqs4s1qKGgW0msQwsDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERht8/fjkAKmmpAUBmAQCKOREaKAxUcgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "2",
      "2.4",
      "3",
      "3.2",
      "4.8"
     ]
    },
    {
     "label": "Spacing >= 5km",
     "url": "72b615a4626825a6bc829ff31215bd1b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMRk1WZysnD78BABfD9y8cDLCDDqhaf0aKGgW2xJgwsDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERht+/fDwAKmmpAUBmAQCKXhEaP2cuPQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "6",
      "6.4",
      "8",
      "9.6",
      "10",
      "16.1",
      "200",
      "800",
      "1000"
     ]
    }
   ],
   "legendGroups": [
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     "id": "0",
     "heading": "spacing1"
    }
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}