quite hard quite complex given the little information so the first thing we asked our self here was so how would we humans solve this problem well what I would do is I would go on Google Maps and check out where transport lines are running right because if a GPS signal is nowhere close to a metro line probably he was not going by Metro and that's what we did we enriched this map of Vienna by adding image channels and each image channel represents a different transport network one represents the Metro network one the bus network and so