3-D system map

[RockCrystal]

Yes, a tetrahedron has 4 vertices. But New York is basically the center of Sirius, plus it has(in Vanilla anyway) 4 jumpgates leading out of it - Colorado, California, Texas, Alaska.
Furthermore, not only is the Alaska link -hugely- stretched out on the map, it leads to an even -more- stretched out jumphole to Omicron Minor. That implies to me that that particular link is actually going more or less vertical as regards the map, and the link was stretched to make everything fit together on a 2-D plane.

---

Be kinder than necessary, because everyone you meet is fighting some kind of battle.
J.M. Barrie