{ "layers": [ { "layerId": 0, "layerName": "pop.dots", "layerType": "Feature Layer", "minScale": 0, "maxScale": 0, "legend": [ { "label": "pop_dens", "url": "8f5aa076e2261bf7a9405f7c518cd102", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAVElEQVQ4jWNhoDJgGTWQYsBCuRGoYNRA7GBvSF4DIwND/X8GhkbnNZMaGCgNQ0YGhnokmnID/zMwNMJcSEgtCzEGQr2J12UwMJpsKAcsVDBjiBkIALb+DdKn1b5wAAAAAElFTkSuQmCC", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "1 Dot = 1 Person/sqkm" } ] } ] }