design challenges must be addressed in order to effectively communicate the spatial context to the user.

Spatial contextual awareness can describe present context - the environment of the user at the present time and location, or that of a future context - where the user wants to go and what may be of interest to them in the approaching spatial environment. Some location-based services are proactive systems which can anticipate future context. Augmented reality is an application which guides a user through present and into future context