• Moving points <-> moving region • MOVEMENT IN GEOGRAPHICAL SPACE in a tissue, in an abstract space, …. • Movement in geographical space
Collecting movement data
• Mobile phone network • Email • Bluetooth • Twitter
Gps tragectory
True movement >>>>>>>>>>>>>>>> Continuous recorded gps trajectory >>>>>> discrete
What can be tracked with a GPS?
• Human beings • Animals • Cars • Bikes • ….
Showcase 1: Pedestrian tracking How do pedestrians move in a city? Where do they go for leisure, shopping, eating, … ?
Showcase 2: Animal tracking • Animal habitat use • Seasonal migration • Foraging and mating behaviour
Showcase 3: Vehicle tracking Real-time traffic monitoring – What is the current traffic situation? – Where are traffic jams, congestions?
Calculating movement parameters • Distance d=|p2-p1| • Time interval Δt= t2-t1 • Speed v=Δt/d • Acceleration • Direction • Turning angle • ….
Error handling
Interpolation error can be controlled by the sampling rate • Measurement error: – Remove parts with non-plausible movement parameters (e.g. speed > 40 km/h for pedestrians) – Map matching