ACTIVITY-ORIENTED CONTEXT MODEL FOR ADAPTIVE MOBILE GIS SYSTEM DESIGN

Open Access
Author:
Chen, Kun
Graduate Program:
Information Sciences and Technology
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
April 20, 2009
Committee Members:
  • Guoray, Cai, Thesis Advisor
  • Guoray Cai, Thesis Advisor
Keywords:
  • mobile GIS
  • context
  • adaptive
Abstract:
Mobile GIS has been used to support many human activities such as tourism, navigation, and crisis management. One of the challenges of dealing with mobility is the continuous change of contexts, which requires the system to be adaptive. Despite considerable research efforts in context adaptation in the mobile map services, there remain a number of limitations. First, context models are inadequate in a sense that they merely deal with physical factors and fail to take into account the dynamics of cognitive factors. Second, the adaptation mechanisms for geovisualization often deal with context changes in isolation to user’s activity resulting in missing the target of adaptation. In this study, I believe that geovisualization should be situated in user’s ongoing activities and dynamically present the most relevant information to the user. This thesis advances the science of context-adaptive map services in two related areas. First, I describe an activity-oriented context model and its computational representation based on the theories of situated activity and SharedPlan. The model binds contextual factors with the plans of the ongoing activity and enables the system to reason the effect of a context change on the advances of the whole activity. Second, I present a method to adapt cartographic visualization based on the above context model. The principles of adapting a mobile map to context change are demonstrated through an analysis of a hypothetical scenario.