Helsinki City Transport offers service, where the current position of every bus is being displayed online. Each bus has a GPS delivering position specific data. The information is shown in real time on Google maps. There are official maps owned by the government that are fare more detailled [2]. In such cases it would make sense to (re)use resources that have been payed via taxes already by the citizens.
[1] http://transport.wspgroup.fi/hklkartta/
[2] http://kartta.hel.fi/opas/main/?lang=en
