MSRA Columbus at GeoCLEF 2006

Authors:
Zhisheng Li;Chong Wang;Xing Xie;Xufa Wang;Wei-Ying Ma
Affiliations:
Department of Computer Science and Technology, University of Sci. & Tech. of China, Hefei, Anhui, 230026, P.R. China;Microsoft Research Asia, 4F, Sigma Center, No.49, Zhichun Road, Beijing, 100080, P.R.China;Microsoft Research Asia, 4F, Sigma Center, No.49, Zhichun Road, Beijing, 100080, P.R.China;Department of Computer Science and Technology, University of Sci. & Tech. of China, Hefei, Anhui, 230026, P.R. China;Microsoft Research Asia, 4F, Sigma Center, No.49, Zhichun Road, Beijing, 100080, P.R.China
Venue:
Evaluation of Multilingual and Multi-modal Information Retrieval
Year:
2007

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Abstract

This paper describes the participation of Columbus Project of Microsoft Research Asia (MSRA) in GeoCLEF 2006. We participated in the Monolingual GeoCLEF evaluation (EN-EN) and submitted five runs based on different methods. In this paper, we describe our geographic information retrieval system, discuss the results and draw following conclusions: 1) if we just extract locations from the topics automatically without any expansions as geo-terms, the retrieval performance is barely satisfactory; 2) automatic query expansion weakens the performance; 3) if the queries are expanded manually, the performance is significantly improved.