{ "layers": [ { "layerId": 0, "layerName": "Census 2010 Tracts", "layerType": "Feature Layer", "minScale": 0, "maxScale": 50000, "legend": [ { "label": "", "url": "cd226cad0a843df42d36de0da363ac8f", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAQ0lEQVQ4jWMpKirqZGBiMGCgBvjHcIGFgYnBIKmjio0a5s2raDNgoYZByGDUwFEDRw0cNXDUQJiB/xguzKtoo1oVAAD4xw0Ahp5oPwAAAABJRU5ErkJggg==", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "" } ] }, { "layerId": 1, "layerName": "Census 2010 Block Groups", "layerType": "Feature Layer", "minScale": 50000, "maxScale": 20000, "legend": [ { "label": "", "url": "8a3e49f225eba29eb6b6662527b976ca", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARklEQVQ4jWMpKCroZGRiNGCgAvj/7/8FFkYmRoPQDic2ahi4umKfAQs1DEIGowaOGjhq4KiBowZCDfz/7/+F1RX7qFYFAACc1BM/KeXNOwAAAABJRU5ErkJggg==", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "" } ] }, { "layerId": 2, "layerName": "Census 2010 Blocks", "layerType": "Feature Layer", "minScale": 20000, "maxScale": 0, "legend": [ { "label": "", "url": "ad6980f3f20c26192568f95a2c194f47", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARUlEQVQ4jWMpKCrqZGRiMGCgAvj/j+ECCyMTg0FkRwMbNQxcXtFgwEINg5DBqIGjBo4aOGrgqIFQA///Y7iwvKKBalUAAE2YEACrjM3mAAAAAElFTkSuQmCC", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "" } ] } ] }