{ "id": "5", "name": "Approximate geochronological age", "type": "Feature Layer", "minScale": "300000", "maxScale": "40000", "legend": [ { "label": "", "description": "", "imageData": "iVBORw0KGgoAAAANSUhEUgAAACIAAAAiCAYAAAA6RwvCAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAh0lEQVRYhe3RvQmAMBCG4QuKlThC2pApMlgWcIpMErdwFBsRjZXNRyrxJ4HvbQ/uHrj2SElKqP0bcEUIRghGCEYIRghWN2QZx7TFmJ01WssQgvoEss+zrNOUX2jMnZWVv+aNCMHqhjTWSudcfqb1d5DeeyXe3zr4KOSNCMEIwQjBCMEIwYqBnEeWEwBg7b9sAAAAAElFTkSuQmCC", "contentType": "image/png" } ] }