Some self-service can seem easy, and in several cases it is. For example, the lighting fixture is designed so it can easily be taken out of the unit. The map, on the other hand is an endless Mylar belt upon which are three continuous printed maps of the world, together with legal time zone boundaries and arrows. At the seams, the ends are joined by a special Mylar adhesive tape. The map is translucent and has sprocket holes at the lower edge. It is engaged by sprocket wheels which are part of the roller assembly supporting the map.

One sprocket wheel has a molded gear on its underside which is engaged by the map drive motor assembly. The process of changing a map can be done at home, but it isn't recommended.