Mapumental is free and open source software by mySociety for displaying journeys in terms of how long they take, rather than by distance, a technique also known as isochrone or geospatial mapping. Users input one or more postcodes and Mapumental displays a map overlaid with coloured bands, each of which represent a set increment of time. Initial work on the project was done by Chris Lightfoot, using open data from Railplanner, Transport Direct and the TfL Journey Planner It was built with support from Channel4ip