Global maps of science based on the new Web-of-Science categories

In August 2011, Thomson Reuters launched version 5 of the Science and Social Science Citation Index in the Web of Science (WoS). Among other things, the 222 ISI Subject Categories (SCs) for these two databases in version 4 of WoS were renamed and extended to 225 WoS Categories (WCs). A new set of 15...

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Bibliographic Details
Published inScientometrics Vol. 94; no. 2; pp. 589 - 593
Main Authors Leydesdorff, Loet, Carley, Stephen, Rafols, Ismael
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.02.2013
Springer
Subjects
Bibliometrics. Scientometrics
Bibliometrics. Scientometrics. Evaluation
Categories
Citation indexes
Computer Science
Exact sciences and technology
Information and communication sciences
Information science. Documentation
Information Storage and Retrieval
Library and information science. General aspects
Library Science
Science
Sciences and techniques of general use
Subject fields
Visualization
Subject categories
Interdisciplinarity
Web of Science
Overlay
Map
Scientometrics
Periodical
Scientific research
Database
Interdisciplinary field
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Summary:In August 2011, Thomson Reuters launched version 5 of the Science and Social Science Citation Index in the Web of Science (WoS). Among other things, the 222 ISI Subject Categories (SCs) for these two databases in version 4 of WoS were renamed and extended to 225 WoS Categories (WCs). A new set of 151 Subject Areas was added, but at a higher level of aggregation. Perhaps confusingly, these Subject Areas are now abbreviated “SC” in the download, whereas “WC” is used for WoS Categories. Since we previously used the ISI SCs as the baseline for a global map in Pajek (Pajek is freely available at http://vlado.fmf.uni-lj.si/pub/networks/pajek/ ) (Rafols et al., Journal of the American Society for Information Science and Technology 61:1871–1887, 2010) and brought this facility online (at http://www.leydesdorff.net/overlaytoolkit ), we recalibrated this map for the new WC categories using the Journal Citation Reports 2010. In the new installation, the base maps can also be made using VOSviewer (VOSviewer is freely available at http://www.VOSviewer.com/ ) (Van Eck and Waltman, Scientometrics 84:523–538, 2010).
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ISSN:0138-9130
1588-2861
DOI:10.1007/s11192-012-0784-8