NICTA I2D2 group at GeoCLEF 2006

Authors:
Yi Li;Nicola Stokes;Lawrence Cavedon;Alistair Moffat
Affiliations:
National ICT Australia, Victoria Research Laboratory, Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia;National ICT Australia, Victoria Research Laboratory, Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia;National ICT Australia, Victoria Research Laboratory, Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia;National ICT Australia, Victoria Research Laboratory, Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia
Venue:
CLEF'06 Proceedings of the 7th international conference on Cross-Language Evaluation Forum: evaluation of multilingual and multi-modal information retrieval
Year:
2006

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Abstract

We report on the experiments undertaken by the NICTA I2D2 Group as part of GeoCLEF 2006, as well as post-GeoCLEF evaluations and improvements to the submitted system. In particular, we used techniques to assign probabilistic likelihoods to geographic candidates for each identified geo-term, and a probabilistic IR engine. A normalisation process that adjusts term weights, so as to prevent expanded geo-terms from overwhelming non-geo terms, is shown to be crucial.