Openstreetmap might be the obvious choice. it uses a fairly simple system of
nodes and ways (ie. lines through nodes).
http://www.openstreetmap.com
I have written a fairly well featured renderer for QT4 which I'm going to
release in the near future. see
http://forums.boatdesign.net/showthread.php?t=20202&page=4
for examples.
cheers,
Tim B
On Wednesday 23 January 2008 20:25, Philip Stubbs wrote:
> * ed (edward.beckmann@???) wrote:
> > Hi
> >
> > I want to express a matrix of interconnecting data in the form of a map,
> > like the london underground. Does anybody know of software to do this?
> >
> > I have a list of subjects which are categorised, with some related to
> > each other (nodes and connections) - can a piece of (free) software make
> > a diagram out of that matrix? I picture the categories as the
> > underground lines and the subjects as stations.
>
> You can draw graphs in gnuplot with text connected with lines. A bit
> crude but have a look at:
> http://gnuplot.sourceforge.net/demo_4.2/datastrings.html
>
> The only other thing that came to my mind was the pstricks package
> for LaTeX.
> http://tug.org/PSTricks/main.cgi?file=examples
>
> Hugo's suggestion may be better. I am just about to take his crash
> course for myself :-)
>
> --
> _
> ,--(_)
> _/ ;-. \ ubuntu
> (_)( )-) Philip Stubbs
> \ ;-'_/ http://stuphi.co.uk
> `--(_)
