A Different Approach to Galactic Mapping

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This is a continuation of my Vir Inter Astrum project I've been working on for the past year or so. I got burned out on the hard science setting and have been on hiatus for a while. I've just gotten back into it, but have moved the setting forward 5000 years to make it more operatic and wide open.

So here is my idea for a galactic map. As I'm going with the conceit that FTL travel has become instantaneous and 99.9% error free, I think the idea of geographical distance loses all importance so I'm laying out this map so it's based on the time a political group came into being and the relationships between each of them. As you can see, its very much in the early stages and I'd really love some feedback on it.

I'll also attach some of the ships I'm conceptualizing just to get a handle on the different houses.