Current WIPs:

First, the absolute positioning map:

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then the "relative positioning" map:

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As you can see I added a whole bunch of stars - there are 240 stars (counting multiple stars within systems for the sake of simplicity) out of my list of 2600 stars.

The abstract "relative" map should now include all stars that are connected to at least one other star.

That unconnected blob of stars in the upper right (of the "relative" map) bothers me, and with each star I add I hope to finally connect it. No luck, so far. If mankind is to ever explore that region, they will have to get there with a huge detour. (Of course I can always cheat and add undiscovered brown dwarfs or what have you).

Anyway, I think having this kind of structure to a region of space is much, much more interesting than the Trekqueque "push a button and go anywhere at the speed of plot".