  Mobile Phone based Participatory Sensing (MPPS) systems involve a community
of users sending personal information and participating in autonomous sensing
through their mobile phones. Sensed data can also be obtained from external
sensing devices that can communicate wirelessly to the phone. We have developed
the tourist subjective data collection system with Android smartphone. The
tourist can tweet the information of sightseeing spots by using the
application. The application can determine the filtering rules to provide the
important information of sightseeing spot. The rules are automatically
generated by Interactive Growing Hierarchical SOM and C4.5.
