It occured to me the other day, that as jumpnodes are somewhat like wormholes, (and Knossi even more so), they take you thousands of light years from where you were. So any two systems in GTVA space don't have to be in physical porximity to each other. although Vega and Capella are joined by a node, and so are close in pracitcal terms, in reality they could be at opposite ends of the galaxy. Mirfak could be nearer to Sol than Delta Serpentis.
Since there is no other way to travel between the systems this doesn't really matter, but I thought I'd bring it up.
the upshot of it is that if you were to take a map of the galaxy, and mark on GTVA space, it would be isolated blobs, scattered randomly, not one large mass, as you would expect (Like Federation space in StarTrek)