Location discourse involves the active or passive sharing of location information between individuals. Related applications include mobile friend locators, and location-dependent messaging. Privacy issues pertaining to location disclosure have been considered in research and relevant design guidelines are emerging, however what location information a user actually "needs to know" has received little systematic analysis to date. In this paper we present results from a questionnaire study and a diary study considering location information need. We provide a classification of location discourse and the factors which impact location need, showing that seemingly small changes in a scenario can yield drastically different location information needs. Finally, we summarize trends that are of interest to designers of location discourse applications.
Derek F. Reilly, David Dearman, Vicki Ha, Ian Smit