VOSviewer is a software tool for constructing and visualizing bibliometric networks. These networks may for instance include journals, researchers, or individual publications, and they can be constructed based on citation, bibliographic coupling, co-citation, or co-authorship relations - vosviewer.com 
Visualising scientific landscapes
VOSviewer also offers text mining functionality that can be used to construct and visualize co-occurrence networks of important terms extracted from a body of scientific literature.
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- vosviewer.com
# Software Below the most recent version of VOSviewer can be downloaded. The software can be used freely for any purpose.
VOSviewer has been developed by Nees Jan van Eck and Ludo Waltman at Leiden University's Centre for Science and Technology Studies (CWTS). If you have any questions or comments regarding VOSviewer, please use the form below to contact the developers.
# University profile maps
The maps displayed below provide an overview of the research profile of a university. The maps show the 250 subject categories (i.e., research fields) in the Web of Science database.
The size of a subject category indicates the activity of a university in the subject category relative to the world average. Activity is measured in terms of publications.
Delft University of Technology - vosviewer.com
The color of a subject category indicates the impact of a university in the subject category relative to the world average. Impact is measured in terms of average number of citations per publication.
# Journal application domain map The map displayed below shows the distribution of journal application domain (JAD) categories across all fields of science worldwide.
The map shows the relational network of 5000 major scientific journals indexed in Web of Science. Inter-journal distances are calculated according to their co-citation similarities - vosviewer.com
The map shows the relational network of 5000 major scientific journals indexed in Web of Science. Inter-journal distances are calculated according to their co-citation similarities.
# See also
- CitNetExplorer
- http://mrvar.fdv.uni-lj.si/pajek/
- Analysis and visualization of large networks with program package Pajek - springeropen.com