text: '''
  Illustrating basic "sketch-maps", without gridded data.
  e.g. https://scitools.org.uk/cartopy/docs/latest/matplotlib/intro.html
  
  '''
  import cartopy
  import cartopy.crs as ccrs
  import matplotlib.pyplot as plt
  #----------------------------------------------------
  
  # Simplest:
  ax = plt.axes(projection=ccrs.PlateCarree())
  ax.coastlines()  ;  plt.show()  ;  plt.close()
  
  
  # A bit nicer:
  ax = plt.axes(projection=ccrs.PlateCarree(central_longitude=10))
  ax.coastlines()
  plt.tight_layout()
  plt.show()  ;  plt.close()
  
  
  # With a stock image:
  ax = plt.axes(projection=ccrs.Mollweide(central_longitude=10))
  ax.stock_img()
  plt.tight_layout()
  plt.show()  ;  plt.close()
  
  
  # Just simple colouring of land and sea:
  ax = plt.axes(projection=ccrs.Robinson(central_longitude=10))
  ax.add_feature(cartopy.feature.LAND)
  ax.add_feature(cartopy.feature.OCEAN)
  ax.coastlines(color="grey")  # Or you could do:
  #ax.add_feature(cartopy.feature.COASTLINE)
  plt.tight_layout()
  plt.show()  ;  plt.close()
  
  
  
  
  # Final example:
  proj = ccrs.Orthographic(central_longitude=0.0, central_latitude=50.0)
  ax = plt.axes(projection=proj)
  ax.add_feature(cartopy.feature.LAND)
  ax.add_feature(cartopy.feature.OCEAN)
  ax.add_feature(cartopy.feature.COASTLINE) #, edgecolor="brown")
  ax.gridlines()
  plt.tight_layout()
  plt.show()  ;  plt.close()
  
  # Other cartopy features include BORDERS, LAKES, RIVERS.
  # http://scitools.org.uk/cartopy/docs/v0.13/matplotlib/feature_interface.html
  