{
 "id": "0",
 "name": "Total dissolved solids",
 "type": "Feature Layer",
 "minScale": "8000000",
 "maxScale": "500000",
 "legend": [
  {
   "label": "High concentration (\u003e1000 mg/l)",
   "description": "",
   "imageData": "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",
   "contentType": "image/png"
  },
  {
   "label": "Low concentration (\u003c500 mg/l)",
   "description": "",
   "imageData": "iVBORw0KGgoAAAANSUhEUgAAACIAAAAiCAYAAAA6RwvCAAAACXBIWXMAAA7EAAAOxAGVKw4bAAABHUlEQVRYhe3VwWqDMBjA8S8SwSfwahC8eFKwL7GuT5BDh4fuLTzkSdajFx9klvUBOiF48iwidge/nTZG1g5aTO0g/2sC+QXyEfqy3aKUEuaMMQZUSglZlpE5IUIIpHMCfmYgavcDeT8ctB/SdR0+rdfwsFxCmqYnB4M2TQPjOKJlWdomp65rKIoChmGANE1P7qHJYgE6EQAAYRiSt/0ePc87u4c6jqPT8F0URX9e9n4e69yArwxEzUDUDETt/0LatsWqqiCO40m/hYshz5sN5HkOr2WJSZJMhrkY8rhaQd/34Pv+VIbrIJxzwjmfFHEVRFcGomYgagaiZiBqN4MgIhJCzv5N1LZtEEKgTsTH8Qjlbgeu62IQBL/WGWPwCRItThVHWqv+AAAAAElFTkSuQmCC",
   "contentType": "image/png"
  },
  {
   "label": "Medium concentration (500–1000 mg/l)",
   "description": "",
   "imageData": "iVBORw0KGgoAAAANSUhEUgAAACIAAAAiCAYAAAA6RwvCAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAWUlEQVRYhe3OQRHAQAgEQVKFifV3snCR84QM8k2NAT7bCjrfe6e7Y5OkyO6Oc86zGamqyc3AnyPkCDlCjpAj5Ag5Qo6QI+QIOUKOkCPkCDlCKSmqajYTkuIDYPEQwYwB5GMAAAAASUVORK5CYII=",
   "contentType": "image/png"
  }
 ]
}