Space-time cube (STC)

In a space-time cube, two dimensions are used to represent space and the third dimension time. A map is drawn in the base of the cube. Trajectories are represented in a space-time cube as three-dimensional lines. Showing a large number of trajectories simultaneously makes the display illegible. STC is more suitable for exploring a few trajectories.

Before applying the STC visualization, it is reasonable to adjust the time references in the trajectories to a common start and/or a common end.
In the images below, the eye trajectories are aligned to common start and end times.

Interactions: rotation and shifting; changing the opacity level; moving a plane along the time dimension for better temporal localization; highlighting and filtering to select individual trajectories or subsets.