title: Colorbar on Geopandas
body: <p>I am trying to create a Matplotlib colorbar on GeoPandas.</p>
  
  <pre><code>import geopandas as gp
  import pandas as pd
  import matplotlib.pyplot as plt
  
  #Import csv data
  df = df.from_csv('data.csv')
  
  #Convert Pandas DataFrame to GeoPandas DataFrame
  g_df = g.GeoDataFrame(df)
  
  #Plot
  plt.figure(figsize=(15,15)) 
  g_plot = g_df.plot(column='column_name',colormap='hot',alpha=0.08)
  plt.colorbar(g_plot)
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>AttributeError                            Traceback (most recent call last)
  &lt;ipython-input-55-5f33ecf73ac9&gt; in &lt;module&gt;()
        2 plt.figure(figsize=(15,15))
        3 g_plot = g_df.plot(column = 'column_name', colormap='hot', alpha=0.08)
  ----&gt; 4 plt.colorbar(g_plot)
  
  ...
  
  AttributeError: 'AxesSubplot' object has no attribute 'autoscale_None'
  </code></pre>
  
  <p>I am not sure how to get colorbar to work.</p>