code: def get_datasets_in_nodes():
      
  
      data_dir = os.path.join(scriptdir, "..", "usgs", "data")
  
      cwic = map(lambda d: d["datasetName"], api.datasets(None, CWIC_LSI_EXPLORER_CATALOG_NODE)['data'])
      ee = map(lambda d: d["datasetName"], api.datasets(None, EARTH_EXPLORER_CATALOG_NODE)['data'])
      hdds = map(lambda d: d["datasetName"], api.datasets(None, HDDS_EXPLORER_CATALOG_NODE)['data'])
      lpcs = map(lambda d: d["datasetName"], api.datasets(None, LPCS_EXPLORER_CATALOG_NODE)['data'])
  
      # Create mapping from dataset to node
      datasets = {}
      datasets.update( { ds : "CWIC" for ds in cwic } )
      datasets.update( { ds : "EE" for ds in ee } )
      datasets.update( { ds : "HDDS" for ds in hdds } )
      datasets.update( { ds : "LPCS" for ds in lpcs } )
  
      datasets_path = os.path.join(data_dir, "datasets.json")
      with open(datasets_path, "w") as f:
          f.write(json.dumps(datasets))
  
      # Find the datasets with ambiguous nodes
      cwic_ee = [ds for ds in cwic if ds in ee]
      cwic_hdds = [ds for ds in cwic if ds in hdds]
      cwic_lpcs = [ds for ds in cwic if ds in lpcs]
      ee_hdds = [ds for ds in ee if ds in hdds]
      ee_lpcs = [ds for ds in ee if ds in lpcs]
      hdds_lpcs = [ds for ds in hdds if ds in lpcs]
docs: Get the node associated with each dataset. Some datasets
      will have an ambiguous node since they exists in more than
      one node.