b116d9ce_ltimodal_Interaction_Use_Cases__Event_Handler
[User Action/External Input] GPS Input at regular intervals [Action on Device] N/A [Event Description] GPS_Data_In Event [Resulting Action] Device updates map on graphical display (assumes all maps are stored locally on device) and highlights current step. When milestone is hit, next instruction is played to user [Event Handler] 
Device processes location data and checks if location milestone is hit
Multimodal Interaction Use Cases