An efficient query indexing mechanism for filtering geo-textual data
Lisi Chen, Gao Cong, Xin Cao · 2013
Massive amount of data that are geo-tagged and associated with text information are being generated at an unprecedented scale. Users may want to be notified of interesting geo-textual objects during a period of time. For example, a user may want to be informed when tweets containing term "garage sale" are posted within 5 km of the user's home in the next 72 hours.