Re-Ranking for Geo-Relevance With Non-Contextual Heuristics at GeoCLEF 2007

Abstract. Geographic Information Retrieval (GIR) in an attempt to improve relevance by taking geographic information in textual documents into account. We describe out experiments carried out at the GeoCLEF 2007 evaluation [1] that investigate further the role of geo-filtering based re-ranking and query expansion with geographic terms. Our main findings are that manual query expansion with geo-terms is moderately effective and simple automatic geo-filtering based reranking suffers from robustness across queries.