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. © Springer-Verlag Berlin Heidelberg 2007.
CITATION STYLE
Li, Z., Wang, C., Xie, X., Wang, X., & Ma, W. Y. (2007). MSRA columbus at GeoCLEF 2006. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 4730 LNCS, pp. 926–929). Springer Verlag. https://doi.org/10.1007/978-3-540-74999-8_118
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