1. NewsStand: A new view on news;Teitler,2008
2. TwitterStand: News in tweets;Sankaranarayanan,2009
3. Taghreed: A system for querying, analyzing, and visualizing geotagged microblogs;Magdy,2014
4. VisCAT: Spatio-temporal visualization and aggregation of categorical attributes in Twitter data;Ghanem,2014
5. Leveraging spatial abstraction in traffic analysis and forecasting with visual analytics;Andrienko;Inf. Syst.,2016