And that's really weird, because now I look into it, I think there's no way I saw a map like this in that game. Nor Frontier on the Amiga, as far as I can see. But when I look at the map, Elite is all I can think about, somehow I feel certain that's where I've seen it before, even though the evidence suggests I'm wrong. There's some strong association going on there. Weeeeeeird.
Edit: I think it might actually just be that I first saw this page so long ago that it feels the same... As soon as I zoomed out I knew I'd seen it before, but not for a long long time.