{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Buildings by Decade",
   "layerType": "Feature Layer",
   "minScale": 3000,
   "maxScale": 0,
   "legend": [
    {
     "label": "1950s",
     "url": "fbfdf2f88f081e1e15cef193e6c6a4a1",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAApElEQVQ4je2TwRHCIBBFX2ZSDC1woyGlhEAJmIa4bQt0gweMowkKGfWQGd+Rw9vP7N+RLzP+hb8XqiCOgen+MBABn0467hJuRAsZAxgVxCerXZdQzWLIFdkjZVifEBqyZXAQt05ZF5ZvtamkPGptMr664TWlQm1hstqpi/QsxncJgXbKjE/nbblfCpPVTs0Sgelp65lqodsJgdt5bVK846i1+YArnQwyzsR4zmUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "195"
     ]
    },
    {
     "label": "1960s",
     "url": "182b8c7a59b6977bd93529b85e816846",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAmUlEQVQ4je3SsQ3DIBAF0J/Yg90OFpvQAz2bnNiBxSxcQBQR7HCO4gLJv6R4+if+jD9nvsHrQc3BAjDvl0cEVueViqfAFnolEfAkzcF5tVgRqJlpH6tiAMhAYDJA6nj5is+WB2CirpbTtBx3Ng79T0GekAD0arGagwBcnQgs6bXcHfchmFtyLBOiGmoHLWmI0qBp8S3jzubnbLq/MIQ0bmH6AAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "196"
     ]
    },
    {
     "label": "1970s",
     "url": "669d549ff89db79197d6d7eddeda8262",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAApklEQVQ4je3SwQ3CIBjF8T/anRpvLMEYzFCYgTFwCG4NQzWfFzRqsWDUQxPfsSS/PsIb+HKGP/h7MObgFEy3D4okC96cbHoLXEHXCFod0DEHb0brusA4B13F7lLO+0B1ZEK2uPLjHNxzy/qVBd3m6i13OhsB33oUABSpCzSjdeccmqAs+C4Q2i2F+rhfgma0Ls4hlQnpB6gy6CYIUBqsWmxlp7P5JBeoaTZOBnL+igAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "197"
     ]
    },
    {
     "label": "1980s",
     "url": "df5e949e17d01583a9af6f52a076f8c2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAn0lEQVQ4je2TsQ3DIBBFH5JXoGQXhnJoDa2TodiFkiFwEVtJsBPOUVJY8i8P6fFOfDp+nO4E/h+YsvNQhqdRhBKMvsVdwAeo1EcWlE3ZBaNHLwKm3NvKaiNlAGRAUA3YcrHzteW7la0EuGV52Nqo0H4UAKIIaPToU74IgCWIgPe0LFUw+iozhMWyj3OF7CtoXWiBIczfa2XxKYetzfeZAG9bNAd4KS9RAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "198"
     ]
    },
    {
     "label": "1990s",
     "url": "f5ec78c15bad0e1d3ff23147dcd0a558",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAArElEQVQ4je3TQQ7CIBQE0PlJOYhyEU5BepvCbUxPwUWwB8E4bmrTFCwYddHEWbJ4fwifDl9O9wd/D6ZonQiG5UAkEOLV6RLeAjPoGdIIaFK0XunRNYFp6o3wnmOrzMPaQAF3sWVwtG7bsnxl0rSApZYHXRsSvvjC24iEJlDp0d2utgoS4ptAoN6ShFfnfLlfgkqPLk19EHBYvzqJ4kJXQQCYv1fWYi8HXZtP8gDM2T8fH/MtUgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "199"
     ]
    },
    {
     "label": "2000s",
     "url": "b376a5f47c9bcf6ed44dc163da8477b5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAoUlEQVQ4je2SQQ7CIBBFO0m5VSVzFU4inASPMqm9FSbfRTFV2sIYddHEv2TI4wG/776c/g/8PTBF64lwfloSAMG4Sd4CLiCUIyYiTtEG40avAqY4cGG1Sp7rgERUhS0HW19a7l2ZNcAty4PWBqDQ+pQcUQGNG/3tcmoCAQQVcN5ctwQoGHfVGT4sUxwkV4hfQetCN4EzdJJu451qOWhtPskdcvBAfbFcAskAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "200"
     ]
    },
    {
     "label": "2010s",
     "url": "5f899d5bc453f960c08c203e1b237375",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAArklEQVQ4je2TwQ3CMAxFv6G3qluUzJFd8B5N9sgwmaOwRZVjZQ5tUSkRMQIOlfi32NLTk/xT4cup/sDfAxMbB5FueRMQRxLfhGt8C3gHiTzMBbAHIZvY+Dr0TgUcuLVrq2ymvQ54FOokt9gksXFbyyxQAKvgZS33WhsiXzwKpgqpgHXoXTqfisCRxOsMgbIlkW/CRWe4WA7cxrlCdg3KFbpsCGD+Xk8Wr7LX2nyQG0kuRcjcApdzAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "201"
     ]
    },
    {
     "label": "2020s",
     "url": "9ebf22d06880e82aa4608e22dcff01b6",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAmElEQVQ4je3SMQ6DMAwF0I/EATx4yW18szo3y23SIUNukC4BIcDBVdsBqX8k4eUHPOPLmf/g78FMrBPw2DxKDYihlvQWeAItkQmQTBxDLeoCM7EY2Jq+7gOvsM3Bum9pXVk84FnLm45NA6LzOyYXGGrRJ/El2IDoApfNo5bWcJtgqEUzceqo7CC13hv+lN7g0GKUm47NJ3kBK0kxSKLjmDcAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "202"
     ]
    },
    {
     "label": "1940s and Earlier",
     "url": "312da9417ce3df2899055f9ab860c3ce",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAmklEQVQ4je2TQQ6CMBBF3yScqOEAvZi2IxfrAQhHclwgC0qVkeiCxLfr5uUl89vxZbq/8PfCgGaQtLwFKQI6cikfCWvRgmHRIAZUJ1J2CXuGeMc2sjWSAJ/QYEc2E9BcV74QWvQIW5WnnY1p68I1ghSXcCLlwM0hRJ2FsF9pOnL1FcJc2TMUg7S+ujUH7SiE5/faVLzjtLM5zgOK0TKVGyFtEAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "decade_built"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "Buildings by Decade",
   "layerType": "Feature Layer",
   "minScale": 15000,
   "maxScale": 3000,
   "legend": [
    {
     "label": "1950s",
     "url": "81003b116a8ceb43057a87eecbb70db8",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAmUlEQVQ4je2TQQrDIBBFnyGHmSu40wOVHCFeIcmB6m6u4GmSLiql0CiJFEpL/3J0Hg8/9rw5/R/4pUCZNADQEdPFxmagLOrYuD4GG6PMCgZfAtcNn2Gvc3MKmO2KkUlDGmw4brji9h3qaW+5I54CpsEGmXUsnjeVYvC7xRh8aaUKzBZGFnWsOLib13YOvWEGxyN3f+QvfxR4A+fhLUw+jxuZAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "195"
     ]
    },
    {
     "label": "1960s",
     "url": "1b6ec1c31eb183ee3547f499fe9a1b19",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAjklEQVQ4je2TUQqAIBBEN+lgeYbwJvufB/Ami2fIky19KFTYWlYQRfO1jOtjYLSFm9X+wJcCkbyNEwdnTDgNRKIOQI2zowYkDwCsJfBOwiUs85sqYEwnC8lbZ3p7GAigikBJF1rmUAV0prdIfpDPT5XCersY1tKNIjClaNLz6aKXF1GRcAUOR3Y/8pcfBU4L9ioMfn5stQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "196"
     ]
    },
    {
     "label": "1970s",
     "url": "d41603e18615299ff2ca52e48cf6266d",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAmUlEQVQ4je3TwQ3DIAwF0A/KTlFvMARjMEPYwWM4O5QbYimTS1upbUAEVapaxUcDD4svJny4phP8UZAzBQCAILqLj8MgJzJK4/poaCxrJhSBrcFN8Al776tDICcyrcs4U3CzD/0TajTBWo2nLIiHQDf7sGZaqusjoRSB3QumCGztTBO8TaE4kbm/6V4Q3eALHHv2/slf/iq4AZWpLNSIHojsAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "197"
     ]
    },
    {
     "label": "1980s",
     "url": "cf44b009a9c76a6e9f62ec6eab279573",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAlklEQVQ4jWNhoDJgGTVwiBr4+HVZA4T174CsaM8Bsg18/LrEgYGBcT8Dw3+oCGP949elDAwM/x1xGUzAhYz78YgzkmQgxHW4wePXZQ2yol0NRBvIwMDkgPAq8YCCWP53gCQDZUW7Gh6/Lq3HLU9WpPx3xB4x/x1x6cBrINQVjJAIYnKAiGFGBAkuRDH4ADFqh0leHlADAePNK46y4r7lAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "198"
     ]
    },
    {
     "label": "1990s",
     "url": "895c6d73185bc9d063c9b785673243e5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAoUlEQVQ4je3T0QnDIBAG4LsjDlKyiC4hbhPHKVkiLpI4iOGuDw2F0ihGCiWh93jq54+HHXy5uj94UjDN1gMAAFFQt3toBlN0GoWnV0N4WBcLgmRycBF8wz77eAhM0WkQzl6WZutVP/r6hMx6P0O52qdMFA6Bqh/9utghu94yFEEye4MRJJM7UwS3FJii08CsAZ7JS2eq3nCDQ83ei/zln4IPltk3l48ORb0AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "199"
     ]
    },
    {
     "label": "2000s",
     "url": "33a63238897d13a4cfec56a6741d315f",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAl0lEQVQ4je3TUQqEIBQFUF/krix0Ka4kd2I7SaJdGd0+FAZmRtFmIIr8kqcen1xs2Z9H+4AXBb3tTZhtjuvFHQa9FZKIJsYQKzSsY8cAqBScBQOWrFMV6K2Qucu87Q3Xs6nosJGvp5aPH1LeXBXI9WzWsRvS6wdCAaC+BQNApc5kwdgFhYAaGWqfQRSDb7Ar2XuTv3wquAMq3DIAjT7nlwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "200"
     ]
    },
    {
     "label": "2010s",
     "url": "6157cf5002edea90747d83c03c68ab10",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAoklEQVQ4je3TwQ3DIAwF0G+UW9QtSOaAWcIeYRB2CXNE3QJxtXtIjgURFKlqVR/Bfli2GHBzDH/wS8HsZg8ADI6P8IzdYHLaKKENIgAABVrzMoFJbAmugkpoq5zTJTA5bSDlx7Kb/Rh23wwqKIOaWIjuLTM4XgLHsPu8TGvpvmspTGLfLYZJbKmmCp5dUHLaHDM9Oq/VNM3whGNL7o/85Y+CL/C0N1aaNsyEAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "201"
     ]
    },
    {
     "label": "2020s",
     "url": "2af64426cab6d36c490f9558ad94e5be",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAkElEQVQ4je3TsQ3EIAwF0I+UAVy4YRuYLN4sbEMKCjYgjYsoClbInXS6KK6QwQ8LiwlfjukF/xTMxKLL5GtJt8FMHByw7FLzSowGxB5sggfsmHdDYCYO1mWZWHwtMtKhCfbikymnIdDXIivxbOyPgQDQgHg2mAbEXo0JahdOBxQ0J1bNpTdUOF05+5C//FNwA6l1KMj+RJfYAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "202"
     ]
    },
    {
     "label": "1940s and Earlier",
     "url": "89519f1dcdca1e4998a5e56c252f7dce",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAlUlEQVQ4je3TTQrDIBCG4dchJ5IeQA8WNOnB6gFKjmSyiIUuMmIkUFo6O/8eBz8cuLiGP/iloGWKAIKkJ2PqBm/cXWZ9vMaZNVhmBOM1uAq+Ywfz5hRYulMvs0xxIcRmMJOd0kS1ulMWJJ0CF0K0zEFb7wpFMP4oGMF47UwVLF2YPaDsYO+8dqbpDQucWvb+yF/+KLgBnJkuD2huOOEAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "decade_built"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Buildings by Decade",
   "layerType": "Feature Layer",
   "minScale": 50000,
   "maxScale": 15000,
   "legend": [
    {
     "label": "1950s",
     "url": "d370aed9ef5bfb6f56921502728555ae",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAcElEQVQ4je3RsQ2AIBBA0a9hGFagYyFlBHAEwkJ0rMA0YGNloUE0seDXl5fLneDlxAAH+BEofXIAzMS8qNgFypA0FQtAxUqftmyUe75hQTPdTjWA52ZiF5iNcjKkSEED5LXzhgDHIy6hJrClAf4Q3AFaYBrO1jZE/AAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "195"
     ]
    },
    {
     "label": "1960s",
     "url": "10f9bfd49fbcf9d311b7d4342e9c3560",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4jWNhoDJgGTVw1EAaGViyem0DhPXvQE9o6AGKDCxZvdqBgYGhHsJjqi9ZvbaxJzS4gQIXMjkQVkOSgejg3wGKDOwJDW4oWb36AMylFIchkiF4DSLJQFLAqIGD0EAAVYIYiMPDL0sAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "196"
     ]
    },
    {
     "label": "1970s",
     "url": "947bde07b8f893af95114d378aa368e3",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAa0lEQVQ4je3QsQ2AIBBG4SdhJ2LnEozBDOAMjMES1xGWIlYmxkKDaGLBqy9f/pzm5fQAB/gRmEoMAFTEzk66wJTjMoEHQOFTias1LjxfqFhub5rAcxXpAq1xIeUo+9LuHx6QS6gJbGmAPwQ3HxUYTmIosMsAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "197"
     ]
    },
    {
     "label": "1980s",
     "url": "2d2d71a022d62265aad7ba4aae2e6e98",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAb0lEQVQ4jWNhoDJgGTVw1EAaGfj4dVkDhPXvgKxozwGKDHz8usSBgeF/PYTHWP/4dVmjrGhXAwUuZHJgYPhPWBnxBqKDfwcoMlBWtKvh8euSAxCXMjDIinZTZiDEkJ4DDAwMeA0iyUBSwKiBg9BAACdOGgyGOtxNAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "198"
     ]
    },
    {
     "label": "1990s",
     "url": "576afa133c4213b54b91c3cbdf66ffb5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAdElEQVQ4je3RwQ2AIAxA0S+BQdRFmIK4jbiNcQoWMQ5CUrx48qBBNPHAPzcvTat5OV3BCn4ExtV5AJQKpp1DERi3wTZJRgCSjHF1k+kX/3xDEUtzO5UBnlMqFIGmX3zchoCIBTBd4Q0BjkdcQllgThX8IbgDoa8eG6UIdJkAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "199"
     ]
    },
    {
     "label": "2000s",
     "url": "68f89aaacd17c86899ff40b5b1cc75af",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbklEQVQ4je3OQQqAIBAF0G/orUS8iifRTjJXGcpbCdrCXYtKpqCFfzUDn8fXeDl6ghP8CCzkUr8qm5BZBBayXqkW+6diIbeasCXBwsUD7b72HDynsgg0YUuFLPelgAm7DOxIZgCX0BA4kgn+EDwAmoEaetpdWcoAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "200"
     ]
    },
    {
     "label": "2010s",
     "url": "28aba8fe18f5fcae9c29491d14413eb6",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAc0lEQVQ4je3Ouw2AIBhF4SOhM25hnINh2EPcg2H+OdQtDC1Y2Fn4QhMLTn3z5WpeThewgB+BwXYOIBKl8bNkgYttDSn1AIqqD7Ybaj+6x6BCGUhns+vgvkiULLD2o1tsK9tTaPyUB27ILMAhdAu8UwF/CK6QIx3UVsvmeQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "201"
     ]
    },
    {
     "label": "2020s",
     "url": "b6e885f727ba880e81baf14fa3c72913",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4jWNhoDJgGTVw1EAaGfhcQKQByjwg+eHNAYoMfC4g4sDIwFAP5dY/FxBplPzwpgGXemJc6ECEGpIMRAcHKDJQ8sObhucCIgcYoC6lOAyRDMFrEEkGkgJGDRyEBgIAzZAXRkg7HGEAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "202"
     ]
    },
    {
     "label": "1940s and Earlier",
     "url": "c1b951471ca67067c52046d61fcc0fa5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAaklEQVQ4je3Ouw2AMBAE0eFERcgF0BicLRq7AixKOgjICPgZJAJPvHralpdrK1jBj8COFAEEscxgRWBg6p1FAZxFO1Ka0fgYdLyH5mx2HdwniBWBMxoDk21PITOWgRsyGHAI3QLvVMEfgit0hRqV0RRZPQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "decade_built"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 3,
   "layerName": "Buildings by Decade",
   "layerType": "Feature Layer",
   "minScale": 100000,
   "maxScale": 50000,
   "legend": [
    {
     "label": "1950s",
     "url": "86d3223a60f6039b55886457cd30c7c3",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWNhoDJgGTVw1MChYqDGxOMNDIwM9Qz/GRpv5Fs2UGwgAyNDPRJNBQP/MzTCXEhIKVEGQr2J12UkGUgKGDVwJBgIALKVDdEuLhgTAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "195"
     ]
    },
    {
     "label": "1960s",
     "url": "7a205e4f004371c2e01abe35af12efd0",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARElEQVQ4jWNhoDJgGTVw1MChYmDJ6rUNDAwM9QwMDI09ocENFBsINQxGU8XARqhhjYQUEmUg1JsNxKgdJrE8aiB9DQQAUcsKhBLTLKQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "196"
     ]
    },
    {
     "label": "1970s",
     "url": "a7041b70c7288a7eddc760bda3b2d33a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWNhoDJgGTVw1MChYuDqk5MbGBkY6v8zMDSGmuc2UGwgIwNDPRJNuYH/GRgaYS4kpJYoA6HexOsykgwkBYwaOBIMBAB5dg1KVVeVDAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "197"
     ]
    },
    {
     "label": "1980s",
     "url": "61418627b0fb4dd0d9c8e7912053dc3d",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARElEQVQ4jWNhoDJgGTVw1MChYuDj12UNDAz/6xkYGBtlRbsaKDYQYhicpoaBjI0wFxJSSZSBUG82EKN2mMTyqIH0NRAAMiYOC3P9h4wAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "198"
     ]
    },
    {
     "label": "1990s",
     "url": "664bfe6897d6f20c399ea8aba22aea6f",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWNhoDJgGTVw1MChYuDvu2ENjIwM9f//MzSyKq9qoNhARkaGeiSacgP//2dohLmQkFqiDIR6E6/LSDKQFDBq4EgwEADMnBAkFc1EdQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "199"
     ]
    },
    {
     "label": "2000s",
     "url": "8139e5739dee045a7abb3865a29e5925",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWNhoDJgGTVw1MChYuDv+XYNjIz/6///Z2xkTTzUQLGBjIz/65Foyg38/5+xEeZCQmqJMhDqTbwuI8lAUsCogSPBQACO1xR5vUrqHQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "200"
     ]
    },
    {
     "label": "2010s",
     "url": "c5a892c660d2b9aa66978b95ef8ceee9",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWNhoDJgGTVw1MChYuDXFLUGhv//6xkYGRu559xqoNhAhv//65FoKhjIyNgIcyEhpUQZCPUmXpeRZCApYNTAkWAgAPtgEs/j5uN9AAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "201"
     ]
    },
    {
     "label": "2020s",
     "url": "4ae8b398bccd26436ec43adb55ef238b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWNhoDJgGTVw1MChYuBzAZEGRgaG+v8MDI2SH940UGwgIwNDPRJNuYH/GRgaYS4kpJYoA6HexOsykgwkBYwaOBIMBADFgQ5GKGz+5AAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "202"
     ]
    },
    {
     "label": "1940s and Earlier",
     "url": "0c9662baf63af771d4c3a7ade50c4fe4",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARElEQVQ4jWNhoDJgGTVw1MChYqARQ2MDAwNjPQPD/8ZzDPUNFBsIMQxOU8PA/40wFxJSSZSBUG82EKN2mMTyqIH0NRAA4uYMnv+ZO2wAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "decade_built"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 4,
   "layerName": "Buildings by Decade",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 100000,
   "legend": [
    {
     "label": "1950s",
     "url": "5d7e1531878a30045febaa5d0011c3d3",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbaDGpOP/b+RZMlLNQGIMI8lAYsGogaMGkgEAEDgF0YftCzUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "195"
     ]
    },
    {
     "label": "1960s",
     "url": "8e5b4b1b180aeb1fca1b4d3ca9c8d1bd",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbWDJ6rX/e0KDGalmIDGGkWQgsWDUwFEDyQAAR6oFhq4AKW0AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "196"
     ]
    },
    {
     "label": "1970s",
     "url": "866899cb69827af657d97838de1aaa94",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbeCak5P/h5jnMlLNQGIMI8lAYsGogaMGkgEApzUFSmOotnIAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "197"
     ]
    },
    {
     "label": "1980s",
     "url": "c08bf95bed2b9e7e409a0a42881d2930",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbeDj16X/ZUW7GalmIDGGkWQgsWDUwFEDyQAACXcFDx/mAukAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "198"
     ]
    },
    {
     "label": "1990s",
     "url": "fa4ead3bde715c7929a17bf5d777fe38",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALUlEQVQ4jWNhoDJgGTVw1MARbeCfe2H/WZRWMVLNQGIMI8lAoi0eNXDUQNIBADvwBSJLAsjeAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "199"
     ]
    },
    {
     "label": "2000s",
     "url": "dd132e6cfa42790ed01621497022d33c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALUlEQVQ4jWNhoDJgGTVw1MARbeCfBbb/WRIOM1LNQGIMI8lAoi0eNXDUQNIBACQDBXkZbazJAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "200"
     ]
    },
    {
     "label": "2010s",
     "url": "d79e80b67885d1cb36c26b761854e51a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbeDXZNX/3HNvM1LNQGIMI8lAYsGogaMGkgEAGXUF1RvAmrkAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "201"
     ]
    },
    {
     "label": "2020s",
     "url": "43f4dfb7e7c7d46ac2754bec0ed196b3",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbeALAZH/Eh/eMFLNQGIMI8lAYsGogaMGkgEARvsGRsIZankAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "202"
     ]
    },
    {
     "label": "1940s and Earlier",
     "url": "aaa76dbb6a17dde723d12be3f209ec83",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALElEQVQ4jWNhoDJgGTVw1MARbaARQ9P/cwx1jFQzkBjDSDKQWDBq4KiBZAAAh5wEnnf+VLAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "decade_built"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}