I thought that map is just interpolating from the schedules, not from GPS? Not that it makes much difference, the schedules in Finland being very accurate for b

I thought that map is just interpolating from the schedules, not from GPS? Not that it makes much difference, the schedules in Finland being very accurate for buses afaik. In Tampere on major stops we have information about when the next bus is coming in, some based on GPS and some on schedules, this distinction is indicated on the board.