Tom Anderson wrote:
That's like suggesting a pair of compasses when someone asks how to draw
a straight line. For drawing a Beckish diagram, geographical software is
the last thing you want.

And your suggestion is? That's as helpful a comment as taking as pair of
compasses and shoving one up each nostril. Aren't crass analogies fun!

GIS software is ideally suited to manipulating vector information,
complete with node labels etc. certainly more so than a simple graphics
package. As we have no idea where the OP is starting from or what he
wants from a 'tube map' (a schematic, geospatial map or otherwise), the
given list of software is comprehensive enough to cater for most mapping
needs.

For sake of completion here is another list;

http://en.wikipedia.org/wiki/List_of...aphics_editors

ESB