Abstract
In its participation at GeoCLEF 2006, the University of Hildesheim focused on the monolingual German and English and the bilingual German ←→ English tasks. Based on the results of GeoCLEF 2005, the weighting of and the expansion with geographic named entities (NE) within a Boolean retrieval approach was examined. Because the best results 2005 were achieved with Blind Relevance Feedback (BRF) in which NEs seemed to play a crucial role, the effects of adding particular geographic NEs within the BRF are explored. The paper presents a description of the system design, the submitted runs and results. A first analysis of unofficial post experiments indicates that geographic NEs can improve BRF and supports prior findings that the geographical expansion within a Boolean retrieval approach does not necessarily lead to better results – as it is often assumed. The discussion is followed by planned future research activies.
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Bischoff, K., Mandl, T., Womser-Hacker, C. (2007). Blind Relevance Feedback and Named Entity Based Query Expansion for Geographic Retrieval at GeoCLEF 2006. In: Peters, C., et al. Evaluation of Multilingual and Multi-modal Information Retrieval. CLEF 2006. Lecture Notes in Computer Science, vol 4730. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74999-8_121
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DOI: https://doi.org/10.1007/978-3-540-74999-8_121
Publisher Name: Springer, Berlin, Heidelberg
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