Overlay Maps of Science(2010 update)

Ismael Rafols1,2, Alan Porter2 and Loet Leydesdorff3

1 SPRU, University of Sussex, Brighton2 School of Public Policy, Georgia Institute Technology, Atlanta

3 Amsterdam School of Comm. Res. (ASCoR), Univ. Amsterdam

Rafols, I., Porter, A. L. and Leydesdorff, L. (2010) Overlay science maps: a new tool for research policy and library management. Journal of the American Society for Information Science and Technology. 61(9), 871–1887.  PDF. Interactive Maps. Overlay toolkit.

Method from Rafols, Porter and Leydesdorff (2009)

Physical Scienceand Engineering

Psychology and Social Sciences

Bio logy and Medicine

Environmental S&T

Global Map of Science, 2010 update224 Web of Science Categories

4 Factors with Pajek

Method from Rafols, Porter and Leydesdorff (2009)

Physical S&T

Psychology and Social Issues

Bio logy and Medicine

Computer Sci. and Engineering

Environmental S&T

Social Sciences

Global Map of Science, 2010 update224 Web of Science Categories

6 Factors with Pajek

Method from Rafols, Porter and Leydesdorff (2009)

Psychological Sci.

Agri Sci

Biomed Sci

Chemistry

Physics

Mech Eng

Environ Sci & Tech

Materials Sci

Infectious Diseases

Clinical Psychology

Social Studies

Clinical Med

Computer Sci

Business & MGT

Geosciences

Ecol Sci

Econ Polit & Geography

Health & Social Issues

Global Map of Science, 2010 update224 Web of Science Categories

19 Factors with Pajek

Math Methods

Method from Rafols, Porter and Leydesdorff (2009)

Psychological Sci.

Agri Sci

Biomed Sci

Chemistry

Physics

Mech Eng

Environ Sci & Tech

Materials Sci

Infectious Diseases

Clinical Psychology

Social Studies

Clinical Med

Computer Sci

Business & MGT

Geosciences

Ecol Sci

Econ Polit & Geography

Health & Social Issues

Global Map of Science, 2010 update224 Web of Science Categories

Insert Pajek Image on top

Math Methods

Global Map of Science, 2010 update224 Web of Science Categories

4 Factors with VOSviewer

Environmental S&T

Bio logy and Medicine

Psychology and Social Sciences

Physical Sciences

Global Map of Science, 2010 update224 Web of Science Categories

4 Factors with VOSviewer

Environmental S&T

Bio logy and Medicine

Psychology and Social Sciences

Physical Sciences

Global Map of Science, 2010 update224 Web of Science Categories

6 Factors with VOSviewer

Computer Sci & Engineering

Psychology and Social Issues

Bio logy and Medicine

Social Sciences

Environmental S&T

Physical Sciences

Global Map of Science, 2010 update224 Web of Science Categories

6 Factors with VOSviewer

Computer Sci & Engineering

Psychology and Social Issues

Bio logy and Medicine

Social Sciences

Environmental S&T

Physical Sciences

19 Factors' 19 factors 6 Factors 6 factors 4 clusters 4 clustersAgri Sci 17 Biology and Medicine 1 Biology and Medicine 1Biomed Sci 1 Computer Sci. and Engineering 6 Environmental S&T 4Business & MGT 14 Environmental S&T 3 Physical Science and Engineering 2Chemistry 16 Physical S&T 2 Psychology and Social Sciences 3Clinical Med 5 Psychology and Social Issues 4Psychological Sci 9 Social Sciences 5Computer Sci 3Ecol Sci 6Econ Polit & Geography 4Environ Sci & Tech 13Geosciences 7Health & Social Issues 10Infectious Diseases 15Materials Sci 2Math Methods 19Mech Eng 12Physics 18Clinical Psychology 8Social Studies 11

Examples

Based on 2007 Global Science Map

Rafols, Porter and Leydesdorff (2009)

Psychological Sci.

Agri Sci

Biomed Sci

Chemistry

Physics

Engineering

Env Sci & Tech

Matls Sci

Infectious Diseases

Clinical Psychology

Social Studies

Clinical Med

Computer SciBusiness & MGT

Geosciences

Ecol Sci

Econ Polit. & Geography

Health & Social Issues

Global Map of Science221 Web of Science Categories18 Factors

U. Amsterdam

EMBL LSE

Georgia Tech

Shell

Nestlé

Unilever

Pfizer

NIH NSF

BBSRC EPSRC

References

Subject Category-based Science 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-based 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, 60(9), 1823-1835.

Overlay• Rafols, I. and Meyer, M. (2010) Diversity and Network Coherence as indicators of

interdisciplinarity: case studies in bionanoscience. Scientometrics, 82(2), 263-287.

• Rafols, I., Porter, A.L. and Leydesdorff, L. (2010) Science overlay maps: A new tool for research policy and library management. Journal of the American Society for Information Science and Technology 61(9), 871–1887.