A Survey on Spatial-Keyword Search

PhD Qualifying Examination


Title: "A Survey on Spatial-Keyword Search"

by

Mr. Nikolaos ARMENATZOGLOU


Abstract:

The thriving increase of geo-tagged data has led to an enormous interest
for Geographic Information Retrieval (GIR) systems. A GIR system stores
spatio-textual objects which consist of a textual description and a
spatial location. Mobile users, by exploiting the proliferation of
geo-positioning technology e.g., by means of GPS, can perform spatial –
keyword queries. Given a spatial location and a set of keywords, a
spatial-keyword query (SKQ) returns the spatio-textual objects whose
location satisfies the spatial constrains of the query and whose textual
description is relevant to the set of query’s keywords e.g., find the two
closest “Chinese Restaurants” to my current location.
In this work, we conduct a survey on spatial-keyword search. More
precisely, for each proposed SKQ we present the indexing schemes that
integrate textual and spatial information and analyze the algorithms for
query processing. Furthermore, we proceed with a comparative study on the
presented approaches and we discuss all practical issues. Finally, we
conclude with future directions and challenges that have a strong
practical interest.


Date:                   Thursday, 15 December 2011

Time:                   2:00pm - 4:00pm

Venue:                  Room 3311
                         lifts 17/18

Committee Members:	Prof. Dimitris Papadias (Supervisor)
                         Dr. Qiong Luo (Chairperson)
 			Prof. Dik-Lun Lee
 			Dr. Ke Yi


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