Parallax is the difference in the apparent position of an object viewed along two different lines of sight. As illustrated above, Parallax is absent from the 2D topographic map which contributes to the difficulty of understanding the information presented. The FoVI 3D light-field display reduces the cognitive load needed to resolve the 2D spatial information that a topographic map carries. By truly presenting the information in three dimensions, the viewer sees all of the actual depth cues as if viewing the natural world