Overlay Maps of Science

1
Overlay Maps of Science

• Ismael Rafols1,2, Alan Porter2 and Loet
  Leydesdorff3
• 2 SPRU, University of Sussex, Brighton
• 2 School of Public Policy, Georgia Institute
  Technology, Atlanta
• 3 Amsterdam School of Comm. Res. (ASCoR), Univ.
  Amsterdam

2
Global Map of Science, 2006 175 SCI Subject
Categories
Ecology
Agriculture
Geosciences
Infectious Diseases
Biomed Sci
Environ Sci
Clinical Med
Chemistry
Matls Sci
Engineering
Neurosciences
Physics
Computer Sci.
General Med
3
Global Map of Science, 2006 175 SCI Subject
Categories
Ecology
Agriculture
Geosciences
Infectious Diseases
Biomed Sci
Environ Sci
Clinical Med
Chemistry
Matls Sci
Engineering
Neurosciences
Physics
Computer Sci.
General Med
4
Global Map of Science, 2007 221 SCI-SSCI Subject
Categories
Env Sci Tech
Ecol Sci
Agri Sci
Infectious Diseases
Geosciences
Clinical Med
Chemistry
Matls Sci
Engineering
Biomed Sci
Cognitive Sci.
Health Social Issues
Psychology
Physics
Computer Sci.
Business MGT
Social Studies
Econ. Polit. Geography
5
Global Map of Science, SCI-SSCI 2007
Env Sci Tech
Agri Sci
Infectious Diseases
Ecol Sci
Geosciences
Clinical Med
Chemistry
Matls Sci
Engineering
Biomed Sci
Cognitive Sci.
Health Social Issues
Psychology
Physics
Computer Sci.
Business MGT
Social Studies
Econ. Polit. Geography
6
References

• Maps
• Leydesdorff, L. and Rafols, I. (2009) A Global
  Map of Science Based on the ISI Subject
  Categories. Journal of the American Society for
  Information Science and Technology, 60(2),
  348-362.
• Rafols, I. and Leydesdorff, L. (2009). Content-bas
  ed and Algorithmic Classifications of Journals
  Perspectives on the Dynamics of Scientific
  Communication and Indexer Effects. Journal of the
  American Society for Information Science and
  Technology. DOI 10.1002/asi.21086.
• Overlay
• Rafols, I., Porter, A. L. and Leydesdorff, L. (in
  preparation) Overlay science maps a new tool for
  research evaluation.
• Rafols, I. and Meyer, M. (2009) Diversity and
  Network Coherence as indicators of
  interdisciplinarity case studies in
  bionanoscience. Scientometrics, DOI
  10.1007/s11192-009-0041-y.