This is going to sound like a blatant plug (it isn't).......
Have a look at my
Reporting Points site. Find your way to lists, then VORs, then for example Trent (TNT). Once you get there, have a look at Overview Map. It may take a while to load (and you will need the Adobe SVG Viewer).
You should see a flat map of the UK, showing TNT as a red spot.
You can resize the window and the map will resize with it. You can right-mouse on the map and choose to zoom from the menu.
If you click on TNT, you will get to see all of the routes passing through TNT. You can then keep clicking to change the view.
So, the map can show spots and lines.....
It took forever to crack the basic functionality but, having done that, it's easy.
If it's of interest, please shout up and we can discuss some more.
Cheers,
Nick