
241Insights and Knowledge Discovery
Context information about a region can be extracted using the IP or GPS position
of the region. For example, the context of a region consisting of a mall is given by
C
tmc
= {Shopping, Restaurant}. Context information about a user could be inferred
from SMS messages, Twitter messages, social network activities, telephone calls,
etc. If no activity or information about a region or a user in that region could be
inferred during preprocessing, then C
tmc
= ∅.
12.2.4 relevanCe measures of a region
Regions are hosts to objects and at times their nearest neighbors. To determine
the importance of a region, and to strongly ...