The XLDB Group at GeoCLEF 2005

This paper describes our participation at the GeoCLEF 2005 task. We detail the main software components of our Geo-IR system, its adaptation for the participation at GeoCLEF and discuss the obtained results. The software architecture includes a geographic knowledge base, a text mining tool for geo-referencing documents, and a geo-ranking component to re-rank the results of a standard IR index according to geo-scopes. Evaluation shows that ranking with geographic scopes is heavily dependent on the information loaded in the knowledge base and on the ranking algorithm involved, requiring more than the correct assignment of a geo-scope to each document. Categories and Subject Descriptors H.3 [Information Storage and Retrieval]: H.3.1 Content Analysis and Indexing; H.3.3 Information Search and Retrieval General Terms Measurement, Experimentation, Design Keywords Geographic Information Retrieval, Text Mining, Evaluation, CLEF, GeoCLEF

• Type: Conference
• Year: 2005
• Where: CLEF
• Authors: Nuno Cardoso, Bruno Martins, Marcirio Silveira Chaves, Leonardo Andrade, Mário J. Silva
• Keywords: CLEF 2005, Geographic Knowledge Base, Knowledge Base, Text Mining