{ "layers": [ { "layerId": 0, "layerName": "Potomac River Dams", "layerType": "Feature Layer", "minScale": 0, "maxScale": 0, "legend": [ { "label": "", "url": "6635402e6caaf751f630fb3327fcc8a5", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAnUlEQVQ4jWNhoDJgGTWQYsAyDAxUKfFlYP4fyPD//ysG5n8TGa5PeE6+gWrFKQwM/2cz/AdxGBkY/jLHMWgX6jBc7X9Hrgvz0PiSDL8YQxkYGGaSayAzhggjI6YYCQbOYWBg6EPiv2NgZVpHvoG3evsZVIveMzAy+jMwMLxh+Puvk+FW7wvyDQSB230LGBgYQHjEJGwSAQupGoa+gQB5OiLaJggt+AAAAABJRU5ErkJggg==", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "" } ] } ] }