old_contents: 
  import matplotlib.pyplot as plt
  import pandas as pd
  import pvl
  
  from .hirise_tools import hirise_dropbox
  
  
  def get_rdr_index_names():
      lblfile = hirise_dropbox() / 'RDRCUMINDEX.LBL'
      label = pvl.load(lblfile)
      table = label['RDR_INDEX_TABLE']
      names = []
      for item in table:
          second = item[1]
          if isinstance(second, pvl.PVLObject):
              names.append(second['NAME'])
      return names
  
  
  def get_rdr_index():
      names = get_rdr_index_names()
      indexfile = hirise_dropbox() / 'RDRCUMINDEX.TAB'
      df = pd.read_csv(indexfile, names=names)
      return df
  
  
  class PolyPlotter(object):
      """For plotting the outline of HiRISE RDR polygons.
      """
      # note, that last point needs to repeat 1 point to close polygon
      lat_indices = ['CORNER1_LATITUDE',
                     'CORNER2_LATITUDE',
                     'CORNER3_LATITUDE',
                     'CORNER4_LATITUDE',
                     'CORNER1_LATITUDE']
      lon_indices = ['CORNER1_LONGITUDE',
                     'CORNER2_LONGITUDE',
                     'CORNER3_LONGITUDE',
                     'CORNER4_LONGITUDE',
                     'CORNER1_LONGITUDE']
  
      def __init__(self):
          self.df = get_rdr_index()
          self.df.set_index('PRODUCT_ID', inplace=True)
  
          print("Loaded RDR index file.")
  
      def plot_prodid(self, product_id, ax=None, **kwargs):
          if ax is None:
              _, ax = plt.subplots()
          ax.plot(self.df.loc[product_id][self.lon_indices],
                  self.df.loc[product_id][self.lat_indices], **kwargs)
  
new_contents: 
  import matplotlib.pyplot as plt
  import pandas as pd
  import pvl
  
  from .downloads import hirise_dropbox
  
  
  def get_rdr_index_names():
      lblfile = hirise_dropbox() / 'RDRCUMINDEX.LBL'
      label = pvl.load(lblfile)
      table = label['RDR_INDEX_TABLE']
      names = []
      for item in table:
          second = item[1]
          if isinstance(second, pvl.PVLObject):
              names.append(second['NAME'])
      return names
  
  
  def get_rdr_index():
      names = get_rdr_index_names()
      indexfile = hirise_dropbox() / 'RDRCUMINDEX.TAB'
      df = pd.read_csv(indexfile, names=names)
      return df
  
  
  class PolyPlotter(object):
      """For plotting the outline of HiRISE RDR polygons.
      """
      # note, that last point needs to repeat 1 point to close polygon
      lat_indices = ['CORNER1_LATITUDE',
                     'CORNER2_LATITUDE',
                     'CORNER3_LATITUDE',
                     'CORNER4_LATITUDE',
                     'CORNER1_LATITUDE']
      lon_indices = ['CORNER1_LONGITUDE',
                     'CORNER2_LONGITUDE',
                     'CORNER3_LONGITUDE',
                     'CORNER4_LONGITUDE',
                     'CORNER1_LONGITUDE']
  
      def __init__(self):
          self.df = get_rdr_index()
          self.df.set_index('PRODUCT_ID', inplace=True)
  
          print("Loaded RDR index file.")
  
      def plot_prodid(self, product_id, ax=None, **kwargs):
          if ax is None:
              _, ax = plt.subplots()
          ax.plot(self.df.loc[product_id][self.lon_indices],
                  self.df.loc[product_id][self.lat_indices], **kwargs)
  
subject: fix broken reference