Not using GPS data (which I believe is a flawed idea, too much battery used for the community) but using the API given by the providers, raildar (http://raildar

Not using GPS data (which I believe is a flawed idea, too much battery used for the community) but using the API given by the providers, raildar (http://raildar.fr/#lat=46.810&lng=6.880&zoom=6 http://raildar.fr/#lat=46.810&lng=6.880&zoom=6) is already displaying trains in real time with their delay.