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The GeoTALP-IR System at GeoCLEF 2005: Experiments Using a QA-Based IR System, Linguistic Analysis, and a Geographical Thesaurus

The GeoTALP-IR System at GeoCLEF 2005: Experiments Using a QA-Based IR System, Linguistic Analysis, and a Geographical Thesaurus

Book SeriesLecture Notes in Computer Science
PublisherSpringer Berlin / Heidelberg
ISSN0302-9743 (Print) 1611-3349 (Online)
VolumeVolume 4022/2006
BookAccessing Multilingual Information Repositories
DOI10.1007/11878773
Copyright2006
ISBN978-3-540-45697-1
CategoryPart VIII. Cross-Language Geographical Retrieval (GeoCLEF)
DOI10.1007/11878773_106
Pages947-955
Subject CollectionComputer Science
SpringerLink DateSunday, October 15, 2006
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Part VIII. Cross-Language Geographical Retrieval (GeoCLEF)

The GeoTALP-IR System at GeoCLEF 2005: Experiments Using a QA-Based IR System, Linguistic Analysis, and a Geographical Thesaurus

Daniel Ferrés1 Contact Information, Alicia Ageno1 Contact Information and Horacio Rodríguez1 Contact Information

(1)  TALP Research Center, Software Department, Universitat Politècnica de Catalunya, Jordi Girona 1-3, 08043 Barcelona, Spain
Abstract
This paper describes GeoTALP-IR system, a Geographical Information Retrieval (GIR) system. The system is described and evaluated in the context of our participation in the CLEF 2005 GeoCLEF Monolingual English task.
The GIR system is based on Lucene and uses a modified version of the Passage Retrieval module of the TALP Question Answering (QA) system presented at CLEF 2004 and TREC 2004 QA evaluation tasks. We designed a Keyword Selection algorithm based on a Linguistic and Geographical Analysis of the topics. A Geographical Thesaurus (GT) has been built using a set of publicly available Geographical Gazetteers and a Geographical Ontology. Our experiments show that the use of a Geographical Thesaurus for Geographical Indexing and Retrieval has improved the performance of our GIR system.

Contact Information Daniel Ferrés
Email: dferres@lsi.upc.edu
URL: http://www.lsi.upc.edu/~nlp

Contact Information Alicia Ageno
Email: ageno@lsi.upc.edu
URL: http://www.lsi.upc.edu/~nlp

Contact Information Horacio Rodríguez
Email: horacio@lsi.upc.edu
URL: http://www.lsi.upc.edu/~nlp
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