Experiments with geographic evidence extracted from documents

Authors:
Nuno Cardoso;Patrícia Sousa;Mário J. Silva
Affiliations:
Faculty of Sciences, University of Lisbon, LASIGE;Faculty of Sciences, University of Lisbon, LASIGE;Faculty of Sciences, University of Lisbon, LASIGE
Venue:
CLEF'08 Proceedings of the 9th Cross-language evaluation forum conference on Evaluating systems for multilingual and multimodal information access
Year:
2008

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Abstract

For the 2008 participation at GeoCLEF, we focused on improving the extraction of geographic signatures from documents and optimising their use for GIR. The results show that the detection of explicit geographic named entities for including their terms in a tuned weighted index field significantly improves retrieval performance when compared to classic text retrieval.