Future Location-Based Experiences

In Future Location-Based Experiences Steve Benford makes a technology watch report on the use of location-based experiences in the education. He gives examples of location-based experiences, categorizes the technology used and introduces the future challenges for location-based experiences. I should make a graph out of this report, because Benford presents location-based expericencs as series of russian-doll style folder hierarchies:
Types of experiences in education:

• Information services and guides
• Games
• Field visits
• Field science

Technologies

• Mobile devices
• Wireless networking (cellular telephony, wireless Ethernes, Bluetooth
• Location sensing (GPS, Wireless network, Ultrasonic systems, RFID tags, accelerometers, vision techniques)

Future challenges

• Dealing with uncertainty of location (limited coverage, accuracy, variation of performance over both space and time.)
• Dealing with uncertainty of connection
• Interoperability
• Privacy