A query-aware document ranking method for geographic information retrieval

  • Authors:

  • Bo Yu;Guoray Cai

  • Affiliations:

  • Pennsylvania State University, State Colloge, PA, USA;Pennsylvania State University, State Colloge, PA, USA

  • Venue:
  • Proceedings of the 4th ACM workshop on Geographical information retrieval
  • Year:
  • 2007

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Abstract

Geographically oriented search must consider both the thematic and geographic dimensions of relevance when matching documents to queries. We propose a dynamic document ranking scheme to combine the thematic and geographic relevance measures on a per-query basis. Query specificity is introduced to determine the relative weights of different sources of ranking evidence for each query. A preliminary evaluation comparing with human judgment shows that our method to distinguish different types of geo-referenced queries based on query specificity is promising to address the issue of relevance combination in GIR document ranking. In addition, we explore the possibility of using Dempster-Shafer's theory to combine the two different sources of ranking evidence.