Fig. 4
From: Outdoor location tracking of mobile devices in cellular networks
GPS trajectories in and around the city center of Ghent (black lines), estimated positions (blue dots), error between estimation and ground truth (blue lines), and NodeBs (gray triangles). aTrajectory on foot (urban + standby). b Trajectory on foot (urban + streaming). c Trajectory by bike (urban + standby). d Trajectory by bike (urban + streaming). e Trajectory by car (urban + standby). f Trajectory by car (urban + streaming)