GPS Navigation
In the second experiment the user was again given control of a
robot in an artificial environment. However, this time, the user was instructed to visit each
waypoint, in order, as displayed by the GPS widget at the bottom of the
screen. When
the user had visited all five waypoints, or four minutes had elapsed, the
round was
terminated. In order to visit a waypoint, the user would navigate the
robot to
that point on the map (indicated by both a GPS coordinate on their HUD
and a
raised mound in the map). When they were within a certain radius of the
waypoint a chime would sound signaling that the waypoint had been
found, and a
new waypoint would be displayed in the HUD. The event would be logged
automatically by the system.
Four maps were designed using the Unreal Editor. These were four times larger than the maps used in the first experiment, as this session aimed to test navigational skills rather than collision avoidance or maneuvering. Each map had the same number of obstacles and waypoints were placed at different points in such a manner that the total distance travelled (the distance from the start point to each waypoint in turn) was equal for all maps.