title: Plot a narrow map region using Python Basemap
body: <p>I would like to plot a map using Basemap (I am not aware of other Python libraries). I am interested in the region centred at latitude 42.9509 and longitude 12.7015, with a radius of 100 km.</p>
  
  <p>I use the following code but the resolution of the image is very low.</p>
  
  <pre><code>lat_0 = 42.9509
  lon_0 = 12.7015
  
  fig = plt.figure(figsize=(8, 8))
  m = Basemap(projection='lcc', resolution='f',
              width=0.3E6, height=0.3E6,
              lat_0=lat_0, lon_0=lon_0)
  
  m.etopo(scale=1, alpha=0.5)
  plt.show()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Lu5rS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lu5rS.png" alt="enter image description here"></a></p>
  
  <p>I would like an image where I could see more details to plot points scattered on top of that.</p>