(Author here)
This is sort of a follow-on from the previous Python mapping tutorial (<a href="http://sensitivecities.com/so-youd-like-to-make-a-map-using-python-EN.html" rel="nofollow">http://sensitivecities.com/so-youd-like-to-make-a-map-using-...</a>). Here, the London Bike Share Network is visualised, and journey times are shown on a histogram with an inset map.