Ed interviews Jo Walsh, a pioneer of the open data movement, one of the earliest people involved in OpenStreetMap, and co-author of the highly-influential O'Reilly book "Mapping Hacks". They discuss the early days of the open data revolution, the emergence of projects like OpenStreetMap, and the challenges and future of open data. And much more. Show notes on the Geomob website, where you can also learn more about Geomob events and sign up for our monthly newsletter.