Fig. 5
From: Potential path volume (PPV): a geometric estimator for space use in 3D
Trajectories of 75 Antarctic petrels (Thalassoica antarctica) on return and departure foraging trips [36]. Trajectories are shown over the Digital Elevation Model of Antarctica [37]. Panel (a) shows the location of the colonies on Antarctic continent, while panel (b) shows trajectories and DEM in real 3D, with a vertical exaggeration of 100 times in order to visually better show movement in three physical dimensions