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Ponencias en congresos:
MIRACLE at GeoCLEF Query Parsing 2007: Extraction and Classification os Geographical Information
Año:2007
Áreas de investigación
  • Telemática
Datos
Descripción
This paper describes the participation of MIRACLE research consortium at the Query Parsing task of GeoCLEF 2007. Our system is composed of three main modules. First, the Named Geo-entity Identifier, whose objective is to perform the geo-entity identification and tagging, i.e., to extract the ¿where¿ component of the geographical query, should there be any. This module is based on a gazetteer built up from the Geonames geographical database and carries out a sequential process in three steps that consist on geo-entity recognition, geo-entity selection and query tagging. Then, the Query Analyzer parses this tagged query to identify the ¿what¿ and ¿geo-relation¿ components by means of a rule-based grammar. Finally, a two-level multiclassifier first decides whether the query is indeed a geographical query and, should it be positive, then determines the query type according to the type of information that the user is supposed to be looking for: map, yellow page or information. According to a strict evaluation criterion where a match should have all fields correct, our system reaches a precision value of 42.8% and a recall of 56.6% and our submission is ranked 1st out of 6 participants in the task. A detailed evaluation of the confusion matrixes reveal that some extra effort must be invested in ¿user-oriented¿ disambiguation techniques to improve the first level binary classifier for detecting geographical queries, as it is a key component to eliminate many false-positives.
Internacional
Si
Nombre congreso
Working notes for the CLEF 2007 Workshop
Tipo de participación
960
Lugar del congreso
BUDAPEST (Hungría)
Revisores
No
ISBN o ISSN
DOI
Fecha inicio congreso
19/09/2007
Fecha fin congreso
21/09/2007
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Título de las actas
Esta actividad pertenece a memorias de investigación
Participantes
  • Participante: J.M. Goñi-Menoyo
  • Autor: Sara Lana Serrano (UPM)
  • Participante: J. Villena-Román
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Ingeniería y Arquitecturas Telemáticas
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