Encyclopedia of Database Systems

Living Edition
| Editors: Ling Liu, M. Tamer Özsu

GMAP

  • Steven M. Beitzel
  • Eric C. Jensen
  • Ophir Frieder
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4899-7993-3_493-2

Synonyms

Definition

The Geometric Mean Average Precision (GMAP) is the geometric mean of the average precision values for an information retrieval system over a set of n query topics. GMAP is expressed as follows (from [ 1]):
$$ \mathrm{GMAP}=\sqrt[n]{{\displaystyle \prod_n{\mathrm{AP}}_n}} $$
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Recommended Reading

  1. 1.
    National Institute of Standards and Technology. TREC-2004 common evaluation measures.Google Scholar

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Telcordia TechnologiesPiscatawayUSA
  2. 2.Twitter, IncSan FransiscoUSA
  3. 3.Georgetown UniversityWashingtonUSA