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I added a file cities.txt as output of the program which allows the user to
generate a google map at http://www.gpsvisualizer.com/geocoder/ . If one
wishes additionally to visualize the links of the network on the google map
in terms of the links, this requires some programming (by using the
information contained in the file coocc.dat). However, this extension can be
obtained directly using Chaomei Chen's CiteSpace. CiteSpace (at
http://cluster.cis.drexel.edu/~cchen/citespace/) uses full address
information (including postcodes), CityColl (at
http://www.leydesdorff.net/software/citycoll/index.htm) only the citynames.
> -----Original Message-----
> From: Chen,Chaomei [mailto:[log in to unmask]]
> Sent: Monday, November 09, 2009 2:34 PM
> To: [log in to unmask]; [log in to unmask]
> Subject: RE: [SIGMETRICS] networks among cities on the basis
> of the Science Citation Index
> Dear Loet,
> That's a nice addition.
> Just to mention that CiteSpace has a function under the
> Geospatial Maps menu, which
> generates geospatial maps in KML format based on city names
> from authors' affiliations.
> Users may opt to include coauthor links between cities.
> These files are viewable in Google Earth.
> Here are some examples of its use:
> Chen, C., Zhu, W., Tomaszewski, B., MacEachren, A. (2007)
> Tracing conceptual and geospatial diffusion of knowledge. HCI
> International 2007. Beijing, China. July 22-27, 2007. LNCS,
> 4564. pp. 265-274.
> Chen, C., Song, I.Y., Yuan, X., Zhang, J. (2008) The thematic
> and citation landscape of Data and Knowledge Engineering
> (1985-2007). Data and Knowledge Engineering, 67(2), 234-259.
> CiteSpace is available at:
> Best wishes,
> Chaomei Chen, Ph.D. Associate Professor
> College of Information Science and Technology, Drexel University
> Editor in Chief, Information Visualization
> ChangJiang Scholar Visiting Professor, Dalian University of Technology
> Homepage: http://www.pages.drexel.edu/~cc345
> IVS: http://www.palgrave-journals.com/ivs/index.html
> CiteSpace: http://cluster.cis.drexel.edu/~cchen/citespace
> From: ASIS&T Special Interest Group on Metrics
> [[log in to unmask]] On Behalf Of Loet Leydesdorff
> [[log in to unmask]]
> Sent: Monday, November 09, 2009 3:45 AM
> To: [log in to unmask]
> Subject: [SIGMETRICS] networks among cities on the basis of
> the Science Citation Index
> Adminstrative info for SIGMETRICS (for example unsubscribe):
> Dear colleagues,
> In the series of programs available from
> http://www.leydesdorff.net/indicators for analyzing data from
> the major
> Science & Technology databases in terms of networks of
> communication, I
> added one which enables the user to extract city names in the
> address field
> as a separate networks. This program may prove useful, for
> example, in the
> regional geography of science.
> Currently, the program was tested for city names and
> postcodes in the US,
> Western Europe (including the UK and some Commonwealth
> nations), China and
> Japan. I expect problems in other parts of the world. Please,
> provide me
> with feedback if such is the case. (Preferentially send me
> the download
> records that cause the problems.) The program is available at
> http://www.leydesdorff.net/software/CityColl/index.htm .
> Let me take the opportunity to mention also the availability
> of Pajek input
> files for mapping the citation environments of the 1,157
> journals included
> in the Arts & Humanities Citation Index 2008, at
> http://www.leydesdorff.net/ah08/index.htm . These journals
> can be studied in
> terms of both their cited and citing patterns using these
> files. The data
> contains cosine-normalized matrices of the k = 1 environments of these
> journals (without thresholds).
> With best wishes,
> Loet Leydesdorff
> Loet Leydesdorff
> Amsterdam School of Communications Research (ASCoR)
> Kloveniersburgwal 48, 1012 CX Amsterdam.
> Tel. +31-20-525 6598; fax: +31-842239111
> [log in to unmask]; http://www.leydesdorff.net/
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