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The Google Earth Phidget Controller utilises a number of interface devices:  \begin{itemize}  \item  Circular Touch - Used for panning around the scene \item  Joystick - Pivots the camera \item  Slider - Used to zoom in and out \item  RFID Reader - Reads the location tags \item  Pressure Sensor - Used as a button to enable RFID programming mode \item  LED Screen - Displays relevent information based on input \end{itemize}