Abstract:Navigation speed for most navigation interfaces is still determined by rate-control devices (e.g. joystick). The interface designer is in charge of adjusting the range of optimal speeds according to the scale of the environment and the desired user experience. We propose a speed-adaptation algorithm based on the spatial relationships between the user and the environment and the user's perception of motion. Two main benefits of, our approach is firstly, the ability to adapt the navigation speed in multi-scale environments and secondly, the capacity to provide a smooth navigation experience decreasing the jerkiness of described trajectories.