1 March 2020 - Faster transportation made longer commutes possible, which meant cities could grow. But Amsterdam started to grow before tramways were electrified and bicycles became popular. What happened?

18 January 2020 - With the Ping if you care programme, the city of Amsterdam has collected about thirty thousand reports from cyclists: for example about long waiting times at traffic lights or about fast cycling routes. I had the opportunity to do an exploratory analysis for cyclists’ organisation Fietsersbond.

8 September 2019 - If you’re cycling in the Netherlands, especially in hilly areas, you may well find yourself on a road named Holleweg (Holloway). I had the idea that if you’d create a map of all the roads named Holleweg, you might end up with a simplified elevation map of the Netherlands.

13 July 2018 - Eight days from now, Amsterdam will have a new metro line traversing the city from north to south. But what about the orientation of the city’s streets?

11 December 2017 - For fifty years, the Soviet Union had an ambitious military programme to map large parts of the world. Two collectors, John Davies and Alexander Kent, have written a great book about the secret maps that resulted from this programme.