Kreuzungen - Where open geospatial data and cycling intersect. .ical 2025-11-15 12:00–12:30, Way I rode my bike from London to Berlin, and had a burning question that I wanted to answer. How many rivers did I cross? With a little bit of geospatial knowledge and some great open data, I found my answer. This is the story of why and how! David Whittingham Geospatial data Engineer passionate about maps, cycling and spending time nature with good friends.