In this chapter, we'll discuss two examples of MEs that are of interest to geographers. One is Project Battuta, which involved developing approaches for collecting and using geospatial data in the field. Utilizing wearable computers, users were able to see computer-simulated information overlaid on top of their real-world view. For instance, in theory an urban geographer could go to the upper floor of a tall building, look out at the city, and see a map of crime incidence overlaid on the city. We'll see that a system marketed by Microvision now provides the capability to make such geographic augmented reality a distinct possibility rather than wishful thinking. The second example of an ME is the work of Nick Hedley (2001;2003), who developed an approach for displaying a VE on a large card held in the user's hands. Users could rotate the card, just as they would rotate an object in the real world, thus providing a potentially more intuitive approach for examining 3-D landscapes than traditional mouse-based interfaces. Although Hedley and those involved with Project Battuta have described their work as a form of aug mented reality, it can be argued that Hedley's work places greater emphasis on interpreting the VE, and thus might be considered a form of augmented virtuality