I spent some time playing with the Open Data published by the City of Milan, aiming to visualize public transport coverage. While I managed to create a heatmap, I was left unsatisfied by the data presentation and format. The initiative is promising but could be dramatically improved by adopting modern standards like GeoJSON instead of Shapefiles and including simple preview capabilities.
In Milan, like in many other cities, public transport tickets have a magnetic strip on the side that is used to check their validity by means of electronic readers. Even now, some years after the intr...